I don't think so, I was invited before the new system was put in and the friend who invited said they only asked for my email. I think it's just bad timing, speculating here but I think they placed in the account activation for all requests(which means that all requests that only required email became null and void or smthn).I haven't heard confirmation that this is an actual bug yet - it sounds like whoever invited you used your email, but didn't select your steam profile. Maybe trying to bypass friend recency requirement.
Just speculating