The Bug

Getting kicked out of a singleplayer world due to a bug or the /kick command sends you to the server list despite it not being on a server, this is possibly due to a 'Kicking' system only being implemented for servers and never intended to be used for singleplayer. Additionally utilizing this method of getting to the server list allows you to bypass the "Caution: Third-Party Online Play" warning screen

Steps to reproduce

1. Join any singleplayer world with that has cheats enabled
2. run the command: /kick @s
3. Click "Back to Server List"
4.  -  Notice how you get taken back to the server list instead of the singleplayer menu and (if applicable) it doesn't show the "Caution: Third-Party Online Play" warning screen