I can reproduce this using beam.py. Here is a log of it failing:
./beam.py -d nfc.clf -v send link "http://www.google.com" [main] enable debug output for 'nfc.clf' [nfc.clf] searching for reader on path usb [nfc.clf.transport] using pyusb version 1.x [nfc.clf.transport] path matches '^(usb|)$' [nfc.clf.device] loading rcs380 driver for usb:054c:06c1 [nfc.clf.transport] >>> 0000ff00ff00 [nfc.clf.rcs380] SetCommandType 01 [nfc.clf.transport] >>> 0000ffffff0300fdd62a01ff00 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd72b00fe00 [nfc.clf.rcs380] GetFirmwareVersion [nfc.clf.transport] >>> 0000ffffff0200fed6200a00 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0400fcd7211101f600 [nfc.clf.rcs380] firmware version 1.11 [nfc.clf.rcs380] GetPDDataVersion [nfc.clf.transport] >>> 0000ffffff0200fed6220800 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0400fcd72300010500 [nfc.clf.rcs380] package data format 1.00 [nfc.clf.rcs380] SwitchRF 00 [nfc.clf.transport] >>> 0000ffffff0300fdd606002400 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd707002200 [nfc.clf.rcs380] GetFirmwareVersion [nfc.clf.transport] >>> 0000ffffff0200fed6200a00 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0400fcd7211101f600 [nfc.clf.rcs380] firmware version 1.11 [nfc.clf] using SONY RC-S380/S NFC Port-100 v1.11 at usb:004:004 [nfc.clf] connect('llcp',) [nfc.snep.server] snep server bound to port 4 (MIU=1984, RW=15), will accept up to 1048576 byte NDEF messages [nfc.clf] connect options after startup: llcp [nfc.clf.rcs380] SwitchRF 00 [nfc.clf.transport] >>> 0000ffffff0300fdd606002400 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd707002200 [nfc.clf] listen 1.000 seconds for DEP [nfc.clf.rcs380] listen_dep for 1.000 sec [nfc.clf.rcs380] nfca_params 010181838f40 [nfc.clf.rcs380] nfcf_params 01fe3810878e4c590000000000000000ffff [nfc.clf.rcs380] TgSetRF 080b [nfc.clf.transport] >>> 0000ffffff0400fcd640080bd700 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd74100e800 [nfc.clf.rcs380] TgSetProtocol 000101010207 [nfc.clf.transport] >>> 0000ffffff0800f8d642000101010207dc00 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd74300e600 [nfc.clf.rcs380] TgSetProtocol 0100 [nfc.clf.transport] >>> 0000ffffff0400fcd6420100e700 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd74300e600 [nfc.clf.rcs380] wait 1000 ms for activation [nfc.clf.rcs380] TgCommRF 0000ffff01010181838f4001fe3810878e4c590000000000000000ffff0000e803 [nfc.clf.transport] >>> 0000ffffff2300ddd6480000ffff01010181838f4001fe3810878e4c590000000000000000ffff0000e8032400 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0900f7d749000000800000006000 [nfc.clf.rcs380] SwitchRF 00 [nfc.clf.transport] >>> 0000ffffff0300fdd606002400 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd707002200 [nfc.clf] sense 106A atr_req=D4008876CCE473CB4F3159320000003246666D010111020207FF03020013040132070103 [nfc.clf.rcs380] SwitchRF 00 [nfc.clf.transport] >>> 0000ffffff0300fdd606002400 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd707002200 [nfc.clf] sense 106A [nfc.clf.rcs380] polling for NFC-A technology [nfc.clf.rcs380] InSetRF 02030f03 [nfc.clf.transport] >>> 0000ffffff0600fad60002030f031300 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd701002800 [nfc.clf.rcs380] InSetProtocol 00180101020103000400050006000708080009000a000b000c000e040f001000110012001306 [nfc.clf.transport] >>> 0000ffffff2800d8d60200180101020103000400050006000708080009000a000b000c000e040f0010001100120013064b00 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd703002600 [nfc.clf.rcs380] InSetProtocol 00060100020007070501 [nfc.clf.transport] >>> 0000ffffff0c00f4d602000601000200070705010b00 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd703002600 [nfc.clf.rcs380] InCommRF 2c0126 [nfc.clf.transport] >>> 0000ffffff0500fbd6042c0126d300 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0600fad70580000000a400 [nfc.clf] found None [nfc.clf.rcs380] SwitchRF 00 [nfc.clf.transport] >>> 0000ffffff0300fdd606002400 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd707002200 [nfc.clf] sense 106A [nfc.clf.rcs380] polling for NFC-A technology [nfc.clf.rcs380] InSetRF 02030f03 [nfc.clf.transport] >>> 0000ffffff0600fad60002030f031300 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd701002800 [nfc.clf.rcs380] InSetProtocol 00180101020103000400050006000708080009000a000b000c000e040f001000110012001306 [nfc.clf.transport] >>> 0000ffffff2800d8d60200180101020103000400050006000708080009000a000b000c000e040f0010001100120013064b00 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd703002600 [nfc.clf.rcs380] InSetProtocol 00060100020007070501 [nfc.clf.transport] >>> 0000ffffff0c00f4d602000601000200070705010b00 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd703002600 [nfc.clf.rcs380] InCommRF 2c0126 [nfc.clf.transport] >>> 0000ffffff0500fbd6042c0126d300 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0600fad70580000000a400 [nfc.clf] found None [nfc.clf.rcs380] SwitchRF 00 [nfc.clf.transport] >>> 0000ffffff0300fdd606002400 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd707002200 [nfc.clf.rcs380] SwitchRF 00 [nfc.clf.transport] >>> 0000ffffff0300fdd606002400 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd707002200 [nfc.clf] listen 1.000 seconds for DEP [nfc.clf.rcs380] listen_dep for 1.000 sec [nfc.clf.rcs380] nfca_params 0101565dbe40 [nfc.clf.rcs380] nfcf_params 01fe3e10d93ffd6e0000000000000000ffff [nfc.clf.rcs380] TgSetRF 080b [nfc.clf.transport] >>> 0000ffffff0400fcd640080bd700 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd74100e800 [nfc.clf.rcs380] TgSetProtocol 000101010207 [nfc.clf.transport] >>> 0000ffffff0800f8d642000101010207dc00 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd74300e600 [nfc.clf.rcs380] TgSetProtocol 0100 [nfc.clf.transport] >>> 0000ffffff0400fcd6420100e700 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd74300e600 [nfc.clf.rcs380] wait 1000 ms for activation [nfc.clf.rcs380] TgCommRF 0000ffff010101565dbe4001fe3e10d93ffd6e0000000000000000ffff0000e803 [nfc.clf.transport] >>> 0000ffffff2300ddd6480000ffff010101565dbe4001fe3e10d93ffd6e0000000000000000ffff0000e8037700 [nfc.clf.transport] <<< 0000ff00ff00 ^C[nfc.clf] terminated by keyboard interrupt [nfc.clf.rcs380] SwitchRF 00 [nfc.clf.transport] >>> 0000ffffff0300fdd606002400 [nfc.clf.transport] <<< 0000ff00ff00 [nfc.clf.transport] <<< 0000ffffff0300fdd707002200 [nfc.clf.transport] >>> 0000ff00ff00
I can reproduce this using beam.py. Here is a log of it failing:
./beam.py -d nfc.clf -v send link "http:// www.google. com" dd62a01ff00 dd72b00fe00 ed6200a00 cd7211101f600 ed6220800 cd72300010500 dd606002400 dd707002200 ed6200a00 cd7211101f600 dd606002400 dd707002200 900000000000000 00ffff cd640080bd700 dd74100e800 8d6420001010102 07dc00 dd74300e600 cd6420100e700 dd74300e600 1838f4001fe3810 878e4c590000000 000000000ffff00 00e803 dd6480000ffff01 010181838f4001f e3810878e4c5900 00000000000000f fff0000e8032400 7d7490000008000 00006000 dd606002400 dd707002200 D4008876CCE473C B4F315932000000 3246666D0101110 20207FF03020013 040132070103 dd606002400 dd707002200 ad60002030f0313 00 dd701002800 004000500060007 08080009000a000 b000c000e040f00 100011001200130 6 8d6020018010102 010300040005000 600070808000900 0a000b000c000e0 40f001000110012 0013064b00 dd703002600 70501 4d6020006010002 00070705010b00 dd703002600 bd6042c0126d300 ad70580000000a4 00 dd606002400 dd707002200 ad60002030f0313 00 dd701002800 004000500060007 08080009000a000 b000c000e040f00 100011001200130 6 8d6020018010102 010300040005000 600070808000900 0a000b000c000e0 40f001000110012 0013064b00 dd703002600 70501 4d6020006010002 00070705010b00 dd703002600 bd6042c0126d300 ad70580000000a4 00 dd606002400 dd707002200 dd606002400 dd707002200 e00000000000000 00ffff cd640080bd700 dd74100e800 8d6420001010102 07dc00 dd74300e600 cd6420100e700 dd74300e600 65dbe4001fe3e10 d93ffd6e0000000 000000000ffff00 00e803 dd6480000ffff01 0101565dbe4001f e3e10d93ffd6e00 00000000000000f fff0000e8037700 dd606002400 dd707002200
[main] enable debug output for 'nfc.clf'
[nfc.clf] searching for reader on path usb
[nfc.clf.transport] using pyusb version 1.x
[nfc.clf.transport] path matches '^(usb|)$'
[nfc.clf.device] loading rcs380 driver for usb:054c:06c1
[nfc.clf.transport] >>> 0000ff00ff00
[nfc.clf.rcs380] SetCommandType 01
[nfc.clf.transport] >>> 0000ffffff0300f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] GetFirmwareVersion
[nfc.clf.transport] >>> 0000ffffff0200f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0400f
[nfc.clf.rcs380] firmware version 1.11
[nfc.clf.rcs380] GetPDDataVersion
[nfc.clf.transport] >>> 0000ffffff0200f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0400f
[nfc.clf.rcs380] package data format 1.00
[nfc.clf.rcs380] SwitchRF 00
[nfc.clf.transport] >>> 0000ffffff0300f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] GetFirmwareVersion
[nfc.clf.transport] >>> 0000ffffff0200f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0400f
[nfc.clf.rcs380] firmware version 1.11
[nfc.clf] using SONY RC-S380/S NFC Port-100 v1.11 at usb:004:004
[nfc.clf] connect('llcp',)
[nfc.snep.server] snep server bound to port 4 (MIU=1984, RW=15), will accept up to 1048576 byte NDEF messages
[nfc.clf] connect options after startup: llcp
[nfc.clf.rcs380] SwitchRF 00
[nfc.clf.transport] >>> 0000ffffff0300f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf] listen 1.000 seconds for DEP
[nfc.clf.rcs380] listen_dep for 1.000 sec
[nfc.clf.rcs380] nfca_params 010181838f40
[nfc.clf.rcs380] nfcf_params 01fe3810878e4c5
[nfc.clf.rcs380] TgSetRF 080b
[nfc.clf.transport] >>> 0000ffffff0400f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] TgSetProtocol 000101010207
[nfc.clf.transport] >>> 0000ffffff0800f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] TgSetProtocol 0100
[nfc.clf.transport] >>> 0000ffffff0400f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] wait 1000 ms for activation
[nfc.clf.rcs380] TgCommRF 0000ffff0101018
[nfc.clf.transport] >>> 0000ffffff2300d
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0900f
[nfc.clf.rcs380] SwitchRF 00
[nfc.clf.transport] >>> 0000ffffff0300f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf] sense 106A atr_req=
[nfc.clf.rcs380] SwitchRF 00
[nfc.clf.transport] >>> 0000ffffff0300f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf] sense 106A
[nfc.clf.rcs380] polling for NFC-A technology
[nfc.clf.rcs380] InSetRF 02030f03
[nfc.clf.transport] >>> 0000ffffff0600f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] InSetProtocol 001801010201030
[nfc.clf.transport] >>> 0000ffffff2800d
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] InSetProtocol 000601000200070
[nfc.clf.transport] >>> 0000ffffff0c00f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] InCommRF 2c0126
[nfc.clf.transport] >>> 0000ffffff0500f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0600f
[nfc.clf] found None
[nfc.clf.rcs380] SwitchRF 00
[nfc.clf.transport] >>> 0000ffffff0300f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf] sense 106A
[nfc.clf.rcs380] polling for NFC-A technology
[nfc.clf.rcs380] InSetRF 02030f03
[nfc.clf.transport] >>> 0000ffffff0600f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] InSetProtocol 001801010201030
[nfc.clf.transport] >>> 0000ffffff2800d
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] InSetProtocol 000601000200070
[nfc.clf.transport] >>> 0000ffffff0c00f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] InCommRF 2c0126
[nfc.clf.transport] >>> 0000ffffff0500f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0600f
[nfc.clf] found None
[nfc.clf.rcs380] SwitchRF 00
[nfc.clf.transport] >>> 0000ffffff0300f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] SwitchRF 00
[nfc.clf.transport] >>> 0000ffffff0300f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf] listen 1.000 seconds for DEP
[nfc.clf.rcs380] listen_dep for 1.000 sec
[nfc.clf.rcs380] nfca_params 0101565dbe40
[nfc.clf.rcs380] nfcf_params 01fe3e10d93ffd6
[nfc.clf.rcs380] TgSetRF 080b
[nfc.clf.transport] >>> 0000ffffff0400f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] TgSetProtocol 000101010207
[nfc.clf.transport] >>> 0000ffffff0800f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] TgSetProtocol 0100
[nfc.clf.transport] >>> 0000ffffff0400f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.rcs380] wait 1000 ms for activation
[nfc.clf.rcs380] TgCommRF 0000ffff0101015
[nfc.clf.transport] >>> 0000ffffff2300d
[nfc.clf.transport] <<< 0000ff00ff00
^C[nfc.clf] terminated by keyboard interrupt
[nfc.clf.rcs380] SwitchRF 00
[nfc.clf.transport] >>> 0000ffffff0300f
[nfc.clf.transport] <<< 0000ff00ff00
[nfc.clf.transport] <<< 0000ffffff0300f
[nfc.clf.transport] >>> 0000ff00ff00