Game Physics and Serverside lag

Recently, my game has started to be extremely laggy serverside. Things like hitboxes that are loaded by the server, and tweening have become extremely clunky and slow.

The script activity is all fine and nothing has enormous rates. There’s only one script that uses the while true do loops. I have no idea what is causing this, has anybody else got this problem before? If yes, would you like to share your own way to find out the root of issues like these?