I am having exactly the same problem. Following a new install of Linux I now have the problem of consistent logins needed.
Additionally I also have problem that following the authentication Minecraft starts but only in demo mode!
Distributor ID: Neon Description: KDE neon User Edition 5.22 Release: 20.04 Codename: focal
WORKAROUND: installing gnome-keyring does indeed solve this problem. Rather annoying for a KDE user!
I am having exactly the same problem. Following a new install of Linux I now have the problem of consistent logins needed.
Additionally I also have problem that following the authentication Minecraft starts but only in demo mode!
Distributor ID: Neon
Description: KDE neon User Edition 5.22
Release: 20.04
Codename: focal
WORKAROUND: installing gnome-keyring does indeed solve this problem. Rather annoying for a KDE user!