I’m a newer player on XBox. I had seen posts about what would be required to increase your power level. I made it a point yesterday to go in and get as many kingdoms as possible to that first silver star. I have yet to complete the quests on most kingdoms, but use the troops. After the update every kingdom that I hadn’t completed the quests for went back to zero! The patch notes said I would keep my star level!
I had also pushed my home kingdom, Blighted Lands, to one gold star. It has reverted back to level 1.
I’m sorry, but I don’t have before and after pictures to prove anything, but was hoping you would be able to see this by my troops.