Comment # 14 on bug 1165351 from Franck Bui

After some more debugging I finally found that the bug is essentially the same
as the one reported here: https://bugzilla.redhat.com/show_bug.cgi?id=1705641

A more interesting discussion can be found here
https://github.com/systemd/systemd/pull/13359 but unfortunately it led to
nowhere.

Adding Thomas in Cc as he's the libtirpc maintainer.