I have noticed that at times when I log out (NOT shutting down, just logging out) Mozilla VPN signs me out completely. However when shutting down and booting up again it works fine.

I am very confident that this is a bug as I recently did a fresh install of Linux Mint XFCE 21(to encrypt it), yet the problem still exists.

Edit: I have it set so that it connects on startup both througu the application and through the XFCE startup applications