Well I come from testing after reinstalling firmware, reset values and make all possible calibrations, and to 4k nothing, a minute and a half reset of gimbal and camera. At 1080 30fps and 60fps, no problems, I have not tried 2k (is that the bitrate that comes by default to 2k in P4 is somewhat low and I do not use it). The rest of P4 handling goes well, flight modes, stability and so on. If you record to 1080 without problems I will not downgrade and wait for DJI to come up with the inspiration and solutions for the firmware failures.