I found a reproducible bug in latest stable Debian on my laptop.
My install is up-to-date with latest security updates (that's the first thing I do anytime I start my laptop).
I'm using Gnome.
Steps to reproduce on my laptop:
- activate the wifi with upper right screen controls
- repeatedly click on "Activities" in the upper left corner to show the quick launch bar and click below to hide it. After a few seconds after the network connection is set, the click on Activities no longer works. After one minute, it starts working again.
Note that if I don't activate the wifi, then I can repeatedly click on "Activities" without triggering the bug.
When I first installed the latest stable Debian on my laptop, I did not encounter this bug.
I suppose it is a bug with Gnome but I'm not sure, that's why I'm here.
I wonder why it started happening a few weeks ago.
I think there was the update to X and I also had a crash of Firefox at its startup because of some recently opened webpage.