My browser / operating system: ChromeOS 14541.0.0, Chrome 123.0.0.0, No Flash version detected
I have found that a lot of times, I add a project to a studio, then I refresh or exit out of it and go back a second later and it wasn't there anymore This is really annoying because your not allowed to advertise on famous projects anymore, so studios are really the only option.

plz answer, I need answers

It might just take a bit for studios to load new projects.
Otherwise, this is definitely a glitch.