Yep, I mentioned it to support before, but my issue was happening at 168 hours+, to which the response was that: “system is not designed for this” which makes sense.
I just experienced the same issue on a long haul flight from KSEA to RJTT. I was only credited with 38 minutes of total flight time and AP+ did not disappear. So, resumed the flight a second time but after finishing still same low flight time and still able to resume the flight again.
EDIT:
I just noticed I got 2 entries in the logbook entries tab for that flight. KSEA-CYAZ with 08h:06 flight time and KSFO-RJTT with 00h38 flight time. Kind of odd since I always had only one entry per flight in the entries tab, even when using AP+.
So, I can’t really say whether I got credited with 08h:44 overall or only 00h38 because at the start of the flight and leaving it then, I definitely didn’t get credited with 08h:06 of flight time.
I started the flight 2 days ago and finished it with a couple of hours left regarding the AP+ time limit.