Problem with MC Java Launcher

So I have a problem with Minecraft Java Launcher on PC

When MC was on, I tried to go to some server, but it told me to open game again, because the session ended or sth like that... It didn't happen for first time so I closed the game and to my suprise I had to log in again

When I log in and open game again it told me the same information when I tried to connect to server and when I close the game I was log out again despite picking up option ,,Stay logged in"

I can go to premium servers if I'm lucky and once in a while this information won't pop up, but I'm not sure what to do about it, it happens today, just a while ago