keystrokes "lost" from browser

[tumbletree]

Qubes OS version
4

Affected component(s) or functionality
Windows focus (again)

Brief summary
Top window registered mouse movements, but not keyboard input. Switched window, tried again, all good again.

To Reproduce
Return to firefox after overnight suspend, select text field and try to type.

Expected behavior
accept text input

Actual behavior
nothing. Mouse move, text could be highlighted and addressbar selected, but nothing typed. I could not find another window/application that was accepting my text, but I really don't know. (n.b. I was looking only in the current workspace). Effect lasted ~60s, at a guess.

Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
I have an output of dmesg, if required.

This is the third or forth time I've encountered an attention-stealing issue. This is the second report (below), for different and more concerning behavior: "what has happened to my keystrokes"? (Nothing of any importance in this case).

I will note also that
a) this has only happened after fedora-31 template upgrade
b) a freeze, again, when opening up gedit to write this report.

This seems very reminiscent of issues reported earlier (duplicates on #5912), but they were from 2015 and 2017. Since this is keystroke data, and seems only triggered since fedora-31, surely this warrants a fix?

Solutions you've tried
If applicable, any solutions or workarounds you've already tried.

Relevant documentation you've consulted
A list of links to the Qubes documentation (or other relevant software documentation) pages you have already consulted.

Related, non-duplicate issues
#5912

[andrewdavidwong]

Possible duplicate of #3267 (as you acknowledge).

Return to firefox after overnight suspend, select text field and try to type.

Does it only affect Firefox? I noticed your other issue (#5912) also only mentioned Firefox.

a freeze, again, when opening up gedit to write this report.

Freezing sounds like a separate problem that should be reported in a separate issue.

[tumbletree]

FIrefox is the principle app I use lately. Just haven't had the chance to notice it on anything else.

If the freeze happens again today, I'll submit a separate report.

[github-actions]

This issue is being closed because:

• This issue is on the "Release 4.0 updates" milestone.
• Qubes OS 4.0 reached EOL (end-of-life) over one year ago.
• There has not been any activity on this issue in over one year.

If anyone believes that this issue should be reopened and reassigned to an active milestone, please leave a brief comment.
(For example, if a bug still affects Qubes OS 4.1, then the comment "Affects 4.1" will suffice.)