Comment 13 for bug 1875150

I have a similar issue, but with direct bluetooth connection (w/o a dingle). I have a Logitech MX Master 3 mouse and Logitech MX Keys keyboard, both connected via bluetooth.
For some reason, they seem to lose connection a few seconds after they connect. Then after reconnect they work fine till the next time they disconnect (purposely, for example during laptop going to sleep).

It was fine with 18.04.3, and started to happen only after I upgraded to 20.04.1.
I tried different distros with different kernel versions, so far I can reproduce this issue with every kernel version higher than 5.3: 5.4 (used in Ubuntu 20.04), 5.6 (Fedora), 5.8 (Fedora).

The issue doesn't happen in openSUSE Leap 15.2 that uses kernel version 5.3.18.