OP knows this already, but for everyone else:
As I mentioned in the other thread, a whole bunch of people seem to have this issue too... Can't figure it out. And like I mentioned, I used
to have this problem intermittently with an APv2 (silver dongle, sold it already) and my vagcom cable. The problem then completely disappeared with the vagcom after a while.
This guy just posted a thread about his AP having this problem: