Sometimes the chat tab glitches out and sometimes it doesn’t. If this happens to you try exiting out of roblox completely (logging out, etc) then going back in. This fixed it for me.
Hope this helps!
Brayd
Hi there. Looks like you might have changed the zoom on your web browser. If your using chrome go over to the side and go to zoom, if it’s way zoomed out you can try clicking the ‘+’ to increase the size.
Hope this helps!
Brayd