The teleportation problem about joining the server

A) When you cancel and join another server(2) when joining a server(1), you will be teleported to your coordinates in server(2) in server (1).
B) You can be teleported by quitting a singleplayer/multiplayer world the moment you switch your dimension through end gate or nether portal.
C) When you use an autoclicker while you're in the nether portal, you can also be teleported to the coordinates present.