Just anecdotally speaking (last time I used mint was many years ago), I used to have problems on there from outdated (GPU) drivers and/or an outdated kernel often when playing games back then, but I don't know what developments happened since then. Back then, problems vanished for me when I changed to Manjaro.

If this persists and no obvious issue can be found, looking into how to upgrade your AMD/NVIDIA drivers or overall kernel beyond the standard ones shipping with stable mint may help in the end (maybe there's a memory leak somewhere in an interaction with an older version?) - or switching to a different Distro, as frustrating as this may end up being. (If gaming is a major activity you plan on, Garuda or Bazzite are the current recommendations)

But treat this one as it is: basically a blind guess based on anecdotes from many years ago. Fingers crossed you'll have it sorted out.