I'm also having this issue.
It has also been reported to me (and I've since tested) that any account that registers through their Google account can not clear the verify email on the user onboarding.
Thanks, I'll check both of these out. There isn't an obvious way to force updates but if you re-save the affected task(s), that'll give it a kick.
This is still happening.
In fact, this add on doesn't recognise any onboarding rask made on accounts with registrations through Google (I've not tested Facebook/Twitter etc). Example - an account registered through Google;
3+ months on since reporting, I'm going to have to reluctantly remove this add on.