Descriptive Problem Summary: This here.
Tried to update IE, Enable javascript there, Clear Cache manually, Update/Downgrade Byond.

Numbered Steps to Reproduce Problem:
Press Player Panel or open Game
Click X on the window so it closes down.
Reopen the window/Player Panel and it will just showcase white.

Expected Results:
Press F6 or be in menu, try to open player Panel etc. and have it open correctly and showcase itself.

Actual Results:
White window is all that shows.

Does the problem occur:
Every time? Or how often? Every Time
In other games? Both TG and bay based SS13 inlcuding CM
In other user accounts? No Clue
On other computers? No Clue

When does the problem NOT occur?
Does not happen when I first launch the game, after opening Playerpanel etc. once and closing it however the next time i try to open it, it breaks.

Did the problem NOT occur in any earlier versions? If so, what was the last version that worked?
Tried earlier versions couldn't find any it didnt break in.

Nothing seems to have worked, restarting after clearing cache fixes it untill i close and try to reopen it again.
Moved to BYOND Help since this is definitely a system issue.
Still an issue to this date for me on both new and old Byond versions.
Also having this problem and haven't been able to find a fix. If anyone has found one please post it here or PM me :(
Some users have managed to solve this by clearing IE's own cache. Sometimes however the best move is to reinstall IE entirely.
I believe another fix for this recently was after a Windows Update, Update my GPU drivers, that seemed to work as well and the issue is now gone after i did it a couple weeks back.