I'm a little concerned with this new firmware on my 2ng gen AirPods Pro. I have had these for about a month and during that first month, the ANC has been mind blowing! They performed amazingly on a cross country flight. Best ever ANC, way better than my Bose QC35 and 700s on a flight. I use them every day sitting at my desk with my Heat Storm HS-1500-PHXG space heater a foot away from my left leg keeping me warm. Up until the latest firmware update a few days ago, I couldn't really hear the space heater's blower. However, today, with the latest firmware, I'm hearing it and quite well with ANC enabled. WTF Apple???