rtl_bt/rtl8852bu_fw.bin Major stability regression

Hi,

Don't know if this the way to report a stability issue related to a 
firmware..... there is no bugtracker on gitlab.

most of the details are 
https://forums.gentoo.org/viewtopic-p-8879246.html#8879246

I have a ID 0bda:b85b Realtek Semiconductor Corp. Bluetooth Radio that 
use rtl_bt/rtl8852bu_fw.bin

after upgrading the fw from 0x098b154b to 0x42d34e04 version (according 
to gentoo ebuild version, it's between 2025-11-11 and 2025-11-25 I have 
major instability

on 0x098b154b it could happens that the mouse got disconnected, but it 
was so infrequent that I didn't searched the cause (several days-weeks 
without issue)

on 0x42d34e04 the disconnect is between each hour to a day

only power-off-on cycle do allow bluetooth device to work again. The 
link seems to be still on because using bluetoothctl disconnect does 
brings the mouse back in search mode (led slow blinking when the link is 
off, led off when connection is on). There is nothing in log that show a 
disconnect, the udev device is still there,

Best regards

JLM

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