I tried to add Baldur's Gate 3 to my config, and while it applied my default settings, it also ended up with an invalid entry - meaning I couldn't change the game config afterwards.

https://i.imgur.com/qUzgvWI.png

Testing a few times removing/re-adding BG3, sometimes I get a blank entry in the config file, sometimes I get what looks like a full entry - except it still doesn't appear in WBG.

Blank entry: https://i.imgur.com/60FSKgv.png

Not blank, but not working: https://i.imgur.com/ZJw4SHB.png

I checked the config file, and noticed that the new entry had a combo of single quotes and parentheses, so I guessed that something there was causing the error. I surrounded strings that broke my syntax highlighting with double quotes, restarted WBG, and everything popped up as expected. I could edit the config, save it, etc.

Double-quoted: https://i.imgur.com/OhHmuJx.png

Problem is, when WBG saves the config, double quotes often get removed :(

I'm guessing this could just be a simple config issue with whatever INI library you're using, though I don't know anything about your codebase.