Bug with Multiplayer and Singleplayer world-joining

I could not confirm this bug for 20w22a yet, because my server is still running on 20w21a. I apologize for that, nevertheless I think it may has not been fixed yet.

When joining my multiplayer server I am able to cancel the joining process and quickly join a singleplayer world. I then get connected to the server anyways and the game crashes. When I then join the singleplayer world again after restarting the game I am teleported to the coordinates my player has on the server.