Patch 18.104.22.1681 Conditions: Levied city-state units are set to return to city-state at the end off the turn (levy is ending). These same levied units are within the border of a city that will rebel to become a free-city at the end of the turn. Result: These levied units disappear at the end of the turn. Moving the levied units outside the border of the rebelling city, before it rebels, prevents the units from disappearing. I have been able to recreate this glitch.