[opensuse-factory] "openSUSE:Factory:snapshot" is inaccessible for builds

Recently I've noticed that all OBS activity related to Tumbleweed on all of my repoes have stalled with "The repository setup is broken" and openSUSE:Factory:snapshot is set to "not publish". It gets "fixed" if I change "snapshot" to "standard" in meta but that's not a viable option. What's up with that ?