keyboard input occasionally stops working for some windows

[Tomislav]

I can't provide steps to reproduce as the behaviour occurs seemingly randomly, but I've noticed that some GNOME windows occasionally stop responding to keyboard input.

In particular, the window has focus and window manipulation hotkeys work (maximise/unmaximise/minimise etc.), but the application within the window no longer seems to receive my keystrokes.

Right now I have a gVim window behaving like that, but I'm pretty sure it also happened with other applications.

The mouse continues to work as expected.

A workaround is to close the window and open a new one, after that it works.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome (not installed)
ProcVersionSignature: Ubuntu 5.4.0-174.193-generic 5.4.265
Uname: Linux 5.4.0-174-generic x86_64
NonfreeKernelModules: lkp_Ubuntu_5_4_0_174_193_generic_104 lkp_Ubuntu_5_4_0_174_193_generic_103
ApportVersion: 2.20.11-0ubuntu27.27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Jun 7 11:24:08 2024
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-xenial-amd64-20160624-2
InstallationDate: Installed on 2018-05-10 (2219 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
SourcePackage: meta-gnome3
UpgradeStatus: Upgraded to focal on 2023-10-02 (248 days ago)