u/Big-Firefighter8825

So I did the Porcelain Cities campaign against Raj and took all of the claimed provinces except Sarisung's. As I was coring the provinces, with no rebels or events, Sarisung suddenly gets 2 of my Porcelain cities that I wasn't done coring. I had another porcelain city from a previous campaign, though it was cored and was not taken. The only event that happened was "Popularity of Porcelain", though it happens 3 months before this incident. Is this a bug? If not, why don't I get any notification about what happens?