Bluetooth - unable to make connections

Recently I tried to transmit a file from Pixel 5a phone to Windows 11 PC using Quick Share in the Files app from Google (select a file, Share, Quick Share icon, send to nearby device, my PC name, Send, while Bluetooth on PC is waiting to receive). All attempts to send a file failed. Then I started the Total Commander (Android app). Quick Share didn't work there too, but then I used Copy/Move/Send via Bluetooth option, and it worked! Connection to PC was established and file sent on the first try. I didn't investigate deeper, where is the difference between two methods, but maybe this can help others.

Intel admits Wi-Fi and Bluetooth conflicts on Windows 11, rolls out fixes with April 2026 driver update
Eventually this update is promised to be delivered to all PCs via Windows Update, but it may take some time.