Battery cell deviations

[trkmml]

hello my mavic air today acted very strange on a flight. I got a note of force on the flight logs. my airdata information here, I wonder what happened? a battery-related problem? or is it related to ESCs?

 

[Mossiback]

I wonder if it was a brief loss of signal.

 

[skyrex]

I don't think it's a battery issue, doing some quick searching I found this on DJI forum of someone experiencing same prompts: dji spark not enough force/esc error
(Please delete if linking to another site is not allowed)

From a partially educated guess, there is a note of AC interference which is the connection between the AC and the RC. Not sure what relevance it has to ESC error.
Possibly something in the area like a cell tower/radio tower etc.
Even if one of the boats or the boat the AC came closest to has a Wi-Fi Access Point or something running on board... never know really.

But also noticing in the space of 2 seconds (lines F to H) the AC dropped 10m in altitude and moved 30m closer to the RC at the same time. It's likely that is what has triggered ESC error. It would have been a fair amount of strain on the motors to undertake such a maneuver.
Possibly has been subjected to unexpected wind gust by the way it tracked through the "loop" at the furthest point out on the flight?

 

[DanMan32]

Wind gust makes sense.
My P3 on a windy day simultaneously gave loose prop and motor obstruction on a windy day. I was quite a number of yards in the gulf so my heart sank for a second in sympathy with the quad, until it sunk in (not sure if pun intended) that I was still getting a perfectly clean and level feed. Must have been an updraft.

 

[trkmml]

I don't think it's a signal problem. In the following picture you can see the voltage drops to 3.5 volts at 3 cells at a time. If you also watch the video, the motors on the right are almost completely stopped and dive.
you can see on video