Ok, some great news/updates:
Another friend of mine that has forums running on the same software is also experiencing the same problem. He also runs the same advertising stack that we run. After a lot of collaboration and back and forth, we've 90% identified the issue to be with our advertising partners.
We've brought them / their techs into the discussion and they are troubleshooting the issue in more detail.
We initially removed advertising as a potential problem because ads don't load for
PFMs, and they were having the problems just as much as non-
PFMs.
It turns out that even though ads weren't showing, some of the ad code was still loading in the background. We think this is the problem (not just
PFMs, but all users).
So here are the two things that we have and are doing and plan to do:
1) We've FULLY removed all the ad-code for
PFMs
2) We are working very closely with our ad partner, Comma, who is a fantastic crew of people, to identify and fix the specific problem. They believe they have a fix in place, but are going to keep testing and reviewing.
So, if you're a
PFM (and logged-in) you should NOT have this problem anymore.
If you're not a PMF, we're hoping this problem has been resolved and/or will continue to get better ASAP.
If you are a PFM, please clear your browser cache and reload BYC. Let us know if the problem continues.