Hi,
I've noticed this as well, particularly at the beginning of the approach phase of flight. Last flight was the worst, I was taxiing in when Center finally responded with vectors toward a visual approach, there probably 5 transmissions in a row, like they'd all somehow hung up and then were released all at the same time. I've tried pausing and unpausing, switching frequencies then back again, etc, without any success. Won't restarting P2A from scratch delete the whole flight plan, etc? I've only used 2.2.1.1, evaluating it for a possible purchase. Overall, it's very good, but the delays are frustrating.
Jeff Brewster