I guess this is just a 1 bug but with a few side effects. The new launcher is broken:
 
(1) Launcher always logged me out from the launcher, it wont save my login session;
(2) It will not save my settings in the launcher, like "keeping the launcher open when game is currently running" kind of settings;
(3) And this is messed up, my world data will not be saved after I save and quit the game, After I re join back to the world, it just keeps me going back to were I was before, before the new launcher.
 
P.S. I tried to play it in my old launcher but, the problems listed above does not exist with my old launcher so I suspected it has to do with the new launcher. Thank you and have a good day!!
 
 - Rondeo B.