I had this issue when I last went into Eureka. I went in with two friends and it made me lead. I kept trying to pass one of them lead and it wouldn’t work. After inviting some people I passed the lead to one of the new people so he could invite his friend and he was able to pass it back to me no problem. I passed it back to him and asked if he could promote that same person I was trying to make lead before and that didn’t work. He also couldn’t pass lead back to me. I don’t think they made any changes to the party system but this may have started up after the re in statement of the need button. I don’t know if it’s a bug but I’ve never had this issue in Eureka before.