I got a automatic update to 2.8.1 from Google this PM, whether,I wanted it or not. I am still flying in baby mode, and was testing video options In a confined space around apartment complex. First automatic take off after update to 2.8. 1 was up to 10 feet, then back down to 3, bouncing around. Noted other Stability issues at low levels as well. As part of learning process checked AC status during flight. I had a abnormal status, checking it, error said left downward camera failure issue contact DJI tech service.
Finished the flight, changed the battery, wiped the camera lens and sonic sensor with my T shirt. Back in the air, with perfect auto take off, and superb stability no abnormal status error.
I was using the circle of a handicapped parking stencil as my drone landing pad. AC is stable within 1 inch, pilot skills take several tries to set it down in circle using camera view only..
In my opinion the outstanding stability in tight spaces makes the P4 a no Brainer over P3x.
Shuan