I have personally been working, or at least on call, 24/7/365 for over 12-18 months constantly having to deal with the repercussions from the type of issues you see talked about here
So did we because we apparently all had to figure it out ourselves.
I'm surprised this got deployed without notifying customers. Especially since the answer was to add more cloudflare ( correct me if i am wrong about this btw ), which anyone experienced with it knows, has a high chance of interfering with a site ( SEO aspects, web previews, etc ) unless it's adjusted.
I always notify my clients when i'm deploying a major change to their security systems. This prompts them to keep a look out for strange system behavior, which has a high likelihood of happening ( tools to do proper simulation of new settings don't exist, so as a systems administrator, you're most often "winging it" )
My clients know their systems need frequent adjustment lately so by prompting for the feedback, i can adjust out any problems we find really quick, since the frontlines are on high alert, and not hesitant at all to report the smallest of problem ( annoying, but exactly what i want )
Xenforo staff need to communicate with their customers a
lot better about things like this.
Nonetheless, good luck solving the issue.