Game in GOG Galaxy Client keeps crashing or freezing

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Arch linux - Gnome.
Hello, I installed Witcher 3 and can play sometimes for hours, then the game will freeze, or sometimes it will crash after playing for just a few minutes. I'm running the Galaxy Client with the latest Proton GE. What can I do to either trace the crash and ideally, prevent the program from freezing or crashing? I've tried verifying the files and launching the executable in DirectX11, it still crashes.

[Qronikarz]

You can either use this command to start Bottles in terminal so it shows logs - flatpak run com.usebottles.bottles or launch the game with the "launch with terminal" button in the program list.

Do mind though that you will need to wait for another crash and the logs may get big, but the final error should be at the bottom when it happens and it may not even show anything useful.