I wanted to create this issue in “development → packaging”, but as I am a new user, I am not allowed to do so.
Problem: gnome-keyring will not popup and apps can not used stored passwords from it.
The problems regarding gnome-keyring and glib2 started with the october update, when glib2.70 was included. Back then I downgraded glib2 and everything worked again. But with the november update this is no longer possible for me, because the display manager (SDDM in my case) will not take any inputs from my keyboard or mouse.