Update to version 1.59.2.133348 this patch puts cities back to normal
In MY case it was because services no longer cross bridges. Remove the bridges and replace the water underneath with roads.
This was the case in my Capitol city. I don't know if it's the same in regionals as I don't have any isolated communities which aren't connected by Game Bridges.
Hope this helps. Hope even more it's a bug which will be fixed as now my Estuary and Mountain outlets are orphans
Same here! Population divided by more than half and although the houses are covered with ambulance, police, etc they seem to have no service. Happiness is at 39% without a reason..
Please EA fix it!!
Bridges no longer connecting roads. Maxis building not covering all services anymore to Latin houses.
