Occasionally, in studio at least, the mouse will straight up break and not properly update. In this state, it seems to only update when reentering the viewport and when clicking/holding mouse buttons. When it happens in studio, it persists until your restart studio. To my knowledge this started happening yesterday.
Here’s what the bug looks like in action. The output on the right shows the current Vector2 returned by UserInputService:GetMouseLocation():
I’m not quite sure what causes it, but I have had it happen almost immediately after starting a play solo session that was a baseplate with a seat and a proximity prompt. No clue if the objects are related or not.
this issue also seems to not update the mouse when you attempt to grab an object.
It also shouldn’t be a computer issue, its on robloxs end. Once you update studio to the latest, mouse breaks.