Log in stuttering

[ATForum]

This seemed to have started when we went from http to https. Users will log in. At first glance it looks like they got logged in but instead of their avatar, it's the greyed out avatar that shows up. If they click on a link on the page, like Home or our banner icon, that seems to kick in the rest of the log in and their avatar will show up and they can post.

Any suggestions for a solution to this?

Thanks.