I know, this is not about scripting but I get this problem:
https://i.gyazo.com/054654a50c310804abfe3826870885c4.mp4
when I click the arrow to view the contents of a model that I took from my inventory, it disappears and deletes the contents, when I Ctrl + Z, the contents come back but the scripts are gone. Any reasons this is happening?
That video doesn’t really show us anything happening other than the arrow disappearing.
What do you have for contents?
Do you have any plugins you’ve recently installed? There may be a script inside one of them that’s doing this.
Should just be a weird error, have you tried the common method, restarting/reinstalling studio yet?
(also, does it occur in different places? or just 1 game?)
I re opened studio and it works somehow!
Glad I helped 
Good luck on whatever you’re trying to make 