Frequently after I open more than one instance of Minecraft and log onto a server, exit them, later when I try to log onto a server I get the message:

"Failed to log in:Invalid session (Try restarting your game and the launcher)"

If I close the game and restart the launcher it just keeps happening. I have the option to keep the launcher running unchecked in settings.

This started happening again around mid January 2023.

What I noticed is that after exiting the games completely (Quit Game), minecraft-launcher would still be in memory, and sometimes giving the Failed to log message. Not just for a few minutes, which happens sometimes. I have done this many times and even with both of my accounts. To resolve the inability to log onto a server I must manually end the processes, or restart the system every time.