This appears to be due to CVE patches in kwallet-pam not policykit-1. Marking this as a duplicate of
Bug #1781418 "User not being initialized correctly on login"
It affects lightdm due to its /etc/pam.d/lightdm including libpam_kwallet{4,5}.so. Solution is to comment/remove those.
See comment #5 of the kwallet-pam bug.
This appears to be due to CVE patches in kwallet-pam not policykit-1. Marking this as a duplicate of
Bug #1781418 "User not being initialized correctly on login"
It affects lightdm due to its /etc/pam.d/lightdm including libpam_ kwallet{ 4,5}.so. Solution is to comment/remove those.
See comment #5 of the kwallet-pam bug.