I myself get this too, it doesn’t necessarily bother me, but it is a bit irritating.
However, I do have a theory on this:
When you leave the game, you know, like you said “ESC + L + RETURN” it calls the leave game function and returns to the Roblox Desktop App. Now, doing it the way mostly everybody does, just closing the window, the leaving game function never gets called, and as you know when Roblox does crash, it’s exactly the same as closing it, so, therefore, Roblox thinks it crashed when in reality all you did was just close it.
This is a bug I’m confident though, because it never used to happen.
Off-topic question; how did you get access to Bug Reports?
On-Topic: Just explain it in as much detail as possible; there really isn’t much to it. Provide a picture of the error message, and if you can, record a video of it happening.
I don’t think it was a Duplicate, and I don’t think they would of known about it at first, yes, I know your supposed to check, but sometimes you forget.