If this motor shutdown issue were a common firmware-related problem, DJI would have acknowledged it in their firmware release notes and likely recommended everyone update immediately. Since that hasn’t happened, it seems unlikely that firmware is the root cause in your case.
The battery connectors, both on the battery and the drone, should sit flush and secure. If your plug was misaligned, that could indicate some kind of physical damage or stress to the drone. Was there an incident or repair that might have caused this? Some context might help narrow things down.
I don’t think these calibrations are going to help. It sounds like you’re facing some kind of power-related issue. If the same problem happens with multiple batteries, it’s probably not the batteries themselves. Instead, it might be the battery connection point on the drone or a deeper internal hardware issue that’s causing a false power loss.
Also, based on your previous thread, it sounds like you may have made some hardware modifications to your drone. If so, those changes could potentially lead to unexpected behavior like this.
Updating firmware on the Phantom 3 can be a bit tricky. If you haven’t done so already, check out the instructions I shared here.