Everytime the Minecraft Launcher (Linux version) is opened, you are placed at the login screen and required to login to your account every time. 

The auto sign-in is not working and this means no Offline play and a very annoying thing to have to re-enter ones password and make sure you have an internet connection everytime you want to play.

This is the case regardless of any Linux system used, and is especially annoying on a SteamDeck as you have broken the windows launcher from working on Linux as well with a came crash error 1 when using Linux systems and proton.

This has been an issue since around end of 2023 or earlier it seems..

The Linux Build is needed to be fixed.

As well as the stupid error 1 when launching the game with proton if the windows version is used (we used the windows version because the login wasn't broken! But now that is completely broken).