Describe the bug
when you somehow open a world while already in a world, your screen becomes gray and you cant do anything, youre stuck in a sort of limbo. you can press esc a few times to bring up the pause menu, if you exit the world you start joining the world you selected in the world selection screen.

To Reproduce
Steps to reproduce the behavior (e.g.):

1. add button to pause menu that takes you to the title screen
2. go to singleplayer
3. join a world
4. LIMBO
5. everything else i described

Expected behavior
probably an error that tells you that you cant join the world while in a world, or at least leaving your current world when the world selection screen is open

Screenshots

Basic Information (please complete the following information):

• fm 3.7 something on forge 1.20.1