The message looks like this:
[ 25.918757] gorilla gnome-shell[2716]: Window manager warning:
Overwriting existing binding of keysym 31 with keysym 31 (keycode a).
The journal was already attached to this bug. I will execute the steps
requested next time this happens in the meantime I am
Public bug reported:
Seeing intermittent stalls of the user interface and I noticed a
coincidence with this message -- maybe not related.
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: gnome-shell 3.38.2-1ubuntu1~20.10.1
ProcVersionSignature: Ubuntu 5.8.0-44.50-generic 5.8.18
Uname: Linux
