I have recently installed the Sublime theme and am running into a bit of an issue with the full screen chat window appearing to overflow the screen on the height:
I assume this is a CSS issue, and I would like to fix this so the view height of the window doesn’t scroll when the full screen chat is open, but I’m brand new to Discourse and I can’t figure out which class or variable is causing the overflow to begin to fix it. 
Any help would be appreciated!
(Also, I don’t know if this is connected, but it appears to do the same thing on the admin panel so it may not be the chat window overflowing but something else in the theme? The chat window does not do this on Horizon or Foundation.)