Trying to host a world so others can join me playing it, but everybody loads in as ~local_player instead of their specific multiplayer profiles already saved within level.dat. Talking to a mod on this thread  (https://www.reddit.com/r/Mojira/comments/r4e6o0/how_can_i_create_an_account/hmtf40e/?context=8&depth=9) we sort of knocked it down to possibly the game getting confused somehow and thinking its in single player mode when its not. There is nothing super abnormal about this world other than its a pre-1.18 world and had Caves and Cliffs experimental pack enabled, and we played quite a bit on it on 1.17, the issue started with the 1.18 update

I've uploaded a copy of the world here, would have attached it to this thread but its 33MB

https://drive.google.com/file/d/1LrdgFuUaeI6G1YnBPuvVbEmArlhe8DT-/view?usp=sharing

Please let me know if you need more information or if I did something improperly, its my first bug report on this tracker