hi

I have the same problem with a different chipset 8087:0029 

I also got a kernel backtrace

kernel: kobject_add_internal failed for hci0:256 with -EEXIST, don't try to register things with the same name in the same directory.
kernel: Bluetooth: hci0: failed to register connection device
kernel: Bluetooth: hci0: link tx timeout
kernel: Bluetooth: hci0: killing stalled connection 75:ab:d6:65:ea:56
kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
kernel: IP: klist_next+0x1c/0x100
kernel: PGD 0 P4D 0 
kernel: Oops: 0000 [#1] SMP NOPTI
kernel: Modules linked in: rfcomm pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) ccm cmac bnep binfmt_misc dm_crypt algif_skcipher af_alg cdc_ether usbnet r8152 mii uvcvideo videobuf2_vmalloc videobuf2_memops btusb videobuf2_v4l2 btrtl btbcm videobuf2_core btintel videodev bluetooth media ecdh_generic snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic hid_multitouch arc4 dell_laptop intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm nls_iso8859_1 irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc snd_hda_intel aesni_intel snd_hda_codec aes_x86_64 snd_hda_core crypto_simd glue_helper snd_hwdep cryptd intel_cstate snd_pcm intel_rapl_perf iwlmvm(OE) snd_seq_midi snd_seq_midi_event dell_wmi mac80211(OE) joydev input_leds dell_smbios snd_rawmidi
kernel:  serio_raw dcdbas snd_seq iwlwifi(OE) snd_seq_device snd_timer dell_wmi_descriptor wmi_bmof snd idma64 intel_wmi_thunderbolt virt_dma cfg80211(OE) soundcore rtsx_pci_ms compat(OE) memstick ucsi_acpi intel_lpss_pci intel_lpss typec_ucsi processor_thermal_device intel_soc_dts_iosf typec int3403_thermal int340x_thermal_zone intel_hid mac_hid int3400_thermal sparse_keymap acpi_thermal_rel acpi_pad sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic usbhid i915 i2c_algo_bit drm_kms_helper rtsx_pci_sdmmc syscopyarea psmouse thunderbolt sysfillrect sysimgblt fb_sys_fops rtsx_pci drm wmi i2c_hid hid video
kernel: CPU: 3 PID: 17609 Comm: kworker/u17:3 Tainted: G        W  OE    4.15.0-1097-oem #107-Ubuntu
kernel: Hardware name: Dell Inc. XPS 13 7390/0G2D0W, BIOS 1.6.0 07/07/2020
kernel: Workqueue: hci0 hci_rx_work [bluetooth]
kernel: RIP: 0010:klist_next+0x1c/0x100
kernel: RSP: 0018:ffffbf86c742fc80 EFLAGS: 00010282
kernel: RAX: 0000000000000000 RBX: ffff996fce487000 RCX: 0000000000000000
kernel: RDX: ffffffffc0f4b230 RSI: ffffbf86c742fcc0 RDI: 0000000000000000
kernel: RBP: ffffbf86c742fcb0 R08: 0000377d840d5913 R09: ffff996ffbf49818
kernel: R10: 0000000000000000 R11: 00007fe43cbf3014 R12: ffffbf86c742fcc0
kernel: R13: 0000000000000000 R14: ffff996ff532c000 R15: ffff996fce487000
kernel: FS:  0000000000000000(0000) GS:ffff99700e4c0000(0000) knlGS:0000000000000000
kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kernel: CR2: 0000000000000020 CR3: 00000001a320a002 CR4: 00000000003606e0
kernel: Call Trace:
kernel:  ? bt_link_release+0x20/0x20 [bluetooth]
kernel:  device_find_child+0x5c/0xb0
kernel:  ? bt_link_release+0x20/0x20 [bluetooth]
kernel:  hci_conn_del_sysfs+0x54/0xa0 [bluetooth]
kernel:  hci_conn_cleanup+0x92/0x140 [bluetooth]
kernel:  hci_conn_del+0xf1/0x1f0 [bluetooth]
kernel:  hci_event_packet+0x1155/0x2d60 [bluetooth]
kernel:  ? __switch_to_asm+0x35/0x70
kernel:  ? __switch_to_asm+0x41/0x70
kernel:  ? __switch_to_asm+0x35/0x70
kernel:  ? __switch_to_asm+0x41/0x70
kernel:  ? __switch_to_asm+0x35/0x70
kernel:  hci_rx_work+0x199/0x390 [bluetooth]
kernel:  ? hci_rx_work+0x199/0x390 [bluetooth]
kernel:  process_one_work+0x1de/0x420
kernel:  worker_thread+0x32/0x410
kernel:  kthread+0x121/0x140
kernel:  ? process_one_work+0x420/0x420
kernel:  ? kthread_create_worker_on_cpu+0x70/0x70
kernel:  ret_from_fork+0x1f/0x40
kernel: Code: 41 5c 41 5d 5d c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 49 89 fc 53 48 83 ec 08 48 8b 3f 4d 8b 6c 24 08 <4c> 8b 77 20 e8 db 24 02 00 4d 85 ed 0f 84 84 00 00 00 49 8b 4d 
kernel: RIP: klist_next+0x1c/0x100 RSP: ffffbf86c742fc80
kernel: CR2: 0000000000000020
kernel: ---[ end trace e0cb46d230eda351 ]---