I assume this is not very common scenario, but here we go anyway:

steps to reproduce

• start MiddleClick as User A
• use Fast User Switching to switch to User B
• "middle click" click anywhere

Current behaviour

• the middle click seems to be in a wrong position which never changes (maybe it's the position where cursor was for User A, not sure)

Expected behaviour

• either dont allow middle clicking if the app runs for different user or make it behave correctly