Hello,
Upstream provided a fix after contacting them using mailing list: https://lists.fedorahosted.org/archives/list/sssd-us...@lists.fedorahosted.org/thread/HQKQOX53YJ2DUNPYPQ4LC7R56UXO2R3Z/#27FR2CRABDFJIVXRFZUXF5GHDKF7PGT7They suggest default Debian configuration is incorrect and sssd section should have "implicit_pac_responder = false".
Best regards, Adam.