I've moved this section to the modding forum as I think that you're saying you only get an issue when you mod your game?
I'm not even going to try applying mods to my game until a later playthrough, so I'm just assuming the steps you're talking about are ones that are recommended to get mods working with the full release.
If they don't, then I can only recommend visiting the Larian Discord modding channel, as that's where the BG3 modding community tend to hang out. Though it's of course possible someone here has already been through the steps to get mods working ...
