The bug
Labeled text in game output will become unlabeled when scrolling from it. This only happens when there are many log messages in the game output.
How to reproduce
Launch instance with logs enabled and open and close a world a few times to generate log messages
Label text in bottom part of game output
Scroll from it, so you can't see it
❌ Text you labeled before is now unlabeled
Confirmed for Windows 10.0 2.2.10322