There’s a recent bug where running a game in studio causes more tabs to open up. This caused issues where it sometimes created duplicate tabs of the same script I was editing.
Not sure if this is correlated, but at the same time my studio would also crash when I try to open one of the duplicated tabs when the game isn’t running.
I was able to replicate this last week on my livestream. The duplicate tabs didn’t cause an issue, though, and changing one copy would change the other.