Thanks for the suggestions guys, gobject-introspectio is up-to-date (1.72.0-1) as is the rest of my system. aur/snapd-glib is the only package which refuses to be updated.
I thought about it and I haven’t actually used pamac in the last 6 months. So I decided to remove pamac-all, libpamac-full and snapd-glib completely. It doesn’t seem to have any noticeable effect for me and the update issues are gone.