Tech Support: Mafia Definitive Edition just displays nothing

Whenever I try to launch Mafia: Definitive Edition on Steam, the game will start but display nothing, yet still play the intro sound. The game is just a transparent window.

A few months earlier I was able to fix the error by changing something in the video config files of the game, but that solution wasn't perfect either, the game would crash every time I alt-tabbed.

I've tried using Proton Experimental and GE, and I've also tried verifying the game files. I'm on the latest Fedora and use Steam Flatpak. I have an AMD GPU.

Likewise, I hope someone can help me figure out the issue and help me resolve it.