Followed the guide here: https://forums.rpgmakerweb.com/index.php?threads/how-to-update-nw-js-to-dramatically-improve-game-performance.131620/

Downloaded the latest 64 bit Linux NW player. Moved the old files to an 'old' folder, then extracted the new files into the 'data' directory of the game.

Finally, rename the 'nw' executable to 'YM'.

After doing this and setting the launch option mentioned, it will run the game as native linux which will drastically improve performance. It should also eliminate any crashes/instability.

This also means it doesn't matter what version of proton you use, since it will actually be running native with this modification.

I strongly recommend taking the steps to get this running natively as it will prevent intermittent crashes that can get frustrating after a while.