Well I'm on 400 Mods and after a lot of tweaking, optimization mods, skse64, etc I do not have the error anymore If I had to guess It was all the huge mods I had (I noticed specific mods like that mod that adds creatures to the sea of ghosts caused it), maybe go through you're big mods if you're still getting it and disable them to see if it works Looking back through the other reasons, It seems like an overload in actors OR Items by mods that add in custom models can cause this bug however I'm not too sure