Maybe zalfie found out something about the sacconejolys through other people. Some shady stuff they probably did/said. And they didnt know that zalfie knew and continued like it was nothing and zalfie were just being polite and avoiding drama but i can imagine alfie having a serious talk with them and so now things arent the same.
Who knows it could be something like that or it could be nothing like that. We will never know.