Since the Apple usb NIC doesn't have this issue, it is a problem on the driver lan78xx.c
Do you mean even without ipv6 tunnel, only setup a bridge on rpi3 to let eth0 connect WAN and let wlan0 play a role of AP, this issue could be reproduced?
Could you please share the detailed steps on how to setup a bridge on the rpi3 to reproduce this issue?
Since the Apple usb NIC doesn't have this issue, it is a problem on the driver lan78xx.c
Do you mean even without ipv6 tunnel, only setup a bridge on rpi3 to let eth0 connect WAN and let wlan0 play a role of AP, this issue could be reproduced?
Could you please share the detailed steps on how to setup a bridge on the rpi3 to reproduce this issue?