The window that shows up when you're connecting to a game that shows the resources downloading and such tends to not go away after the game finishes loading/connecting, as seen here.
Numbered Steps to Reproduce Problem:
It's quite random, but... just join a game and sometimes they won't go away.
Code Snippet (if applicable) to Reproduce Problem:
It won't go away. Trying to manually close it yields no results.
Does the problem occur:
Every time? Or how often? Frequently.
In other games? Doesn't really matter, has happened to me with several games.
In other user accounts? Untested.
On other computers? Untested.
When does the problem NOT occur?
Did the problem NOT occur in any earlier versions? If so, what was the last version that worked?
You have to entirely close out BYOND for it to go away.