How are you using mirror mode if you don't have a VIP account?
Can you be more specific, what you just explained makes no sense to me at all.
Might wanna start using the bug report template and get me a GIF to show me whats going on.
Makes things 50 times easier..
Would be strange if you had this issue out of all my users ... mouse bouncing is alos client related, but I'm assuming you doing something wrong here.
Khaleesi