Help: game stick in mouse lock!

First off: I've searched online for ages on this, asked ChatGPT, and scoured through all the scripts in my game to see if there's any overrides, but I can't find anything, and I've tried everything I can find. Even deleted everything down to the base terrain and it's still an issue.

Suddenly my game has made the camera locked to the movement of the mouse instead of seeing the cursor like normal. It appears like something is overriding the camera but I can't find what. I deleted the camera and gone through the settings but I'm now at a loss and it's really annoying. It doesn't just happen in the Editor, but if I play the game in the PC Roblox client too.

Any ideas or anything? Thanks!