Hi, a country with 1 province in my head shouldn't be able to shrink, so i'll set some form of check to make sure only a country with maybe more than 2-4 provinces can shrink.
state expansions are kinda buged like alot in the newest update, same with colonization and shrinking, where they do not always remove the province from the country that lost it. those bugs should be fixed in a nearly finished update i'm working on.
so hopefully everything should be fixed sorta soon :3 Thanks for the feedback <3