Quote:...PS I have tried removing GIMP and reinstalling, but nothing has changed. ...
That is a real Windows user desperation move. Does not work for linux either since all the settings are held in your Gimp user Profile ~/.config/GIMP/2.10 ( a hidden folder, enable hidden files in your file manager)
I honestly do not know if this will work but go into that folder and rename the file devicerc say to devicerc-bak That holds mouse (and graphics tablet if there is one) settings.
Close Gimp and restart. A new default devicerc file is made. See if that makes any difference.
Edit: I recall you use Mint 20.It would help if you gave where the Gimp 2.10.24 comes from ? PPA or flatpak or....?