I frequently get the HFR out of tolerance popup message and alerts through the notification system when AF runs. It is not clear to me whether there is a real issue or if it is a false alarm. My AF curves are asymmetrical, like the picture below, and I wonder if that is what is causing the warnings. The scope is an astrograph with a large central obstruction.
The lowest points at the bottom of the V can sometimes be wider and flatter than I indicated in the sketch when seeing is bad.
My refractor’s V-curves are nice and symmetrical and I rarely if ever get the tolerance warning when using that scope.
I can get you AF packs and logs if you need them.