Can you give the context of when this happened? Are you in Play Solo, New Play Solo, Start Server? Is the game running or paused? Did this happen immediately after the autosave? What’s your OS?
We need enough details to be able to reproduce the problem if you expect it to be fixed.
It happened when I was scrolling through Explorer, I was editing a script, and I was in normal edit mode (none of the testing modes). It did not happen immediately after an autosave.
I had twelve scripts open, one of those was Kohl’s Admin Commands (I hate that script but I’m helping a friend that 90% of RBXDev members dislike). I had also been working on the game for four hours.