Assassin's Creed Origins - Epic Games version

Hello. I am having trouble running the Epic Games version of AC Origins through Heroic Games on Steam Deck. The game boots and runs fine, but once you get to the actual game world, it becomes a glitchy mess. Tons of problems with the textures and geometry, as if they weren't loading properly or were "corrupt". I attach the corresponding logs to discard whether it's a Heroic Games issue or otherwise. I also attach a screenshot of the game to better illustrate what I mean. Thanks! Log: https://0x0.st/8fjb.log