Roblox Studio hangs up, does not respond, long blackscreens

Whenever starting a Roblox game, the application will stay black screened for about 30 seconds before it all works normal. Starting Roblox Studio takes longer than usual, and will hang up sometimes. When wanting to test play in Roblox Studio I have to wait like 20 seconds before it stops loading & saving scripts and opening new places just takes ages aswell.

This makes something that I would usually do on a 2 hour session to take 5 hours.
People keep spamming me in my Discord where the game is, when the real answer is that I have not been able to work on it consistantly for 5 months, how to go on about this?

I tried reinstalling, is there a way I can clear it up more with caches or something, if so how?

It will freeze if I have been afk like 10 minutes in the program aswell, while being tabbed out.

To add, my computer is very high powered and have no other problem with other programs.