I play 2 characters on same screen. I have Sandbox enabled on both (not sure if that's correct.) Yet, for some reason when chat scrolls up on either window I can only see it as far as the border of the box. Which is to say, if I expand the chat window, all but the bottom half is empty (where the border of the window would have been). It's driving me insane since when people /t me I can't read it if it scrolls off screen before I can see it. Happens on both characters.
Edit: I should've added, its almost completely random. Sometimes I'll open the chat (expand) and see the full log, others its blank. And it can be blank on one, or both characters...or neither.