Yeah it's super annoying having to fight the chat scroll when I'm trying to read stuff in an active chat. Especially if it's a VERY active chat and I have to basically stop what I'm doing and make the chat window cover my whole screen just to follow a conversation.

Yes this has been a problem for me more than once. It's irritating.

If there's an option somewhere to shut it off entirely I'd love to hear it, but I don't think there is.