"A" motor stopped spin

Hello,
During the test flight of the aircraft I assembled myself, the following situation occurred in the video.
problem1
Has anyone encountered similar problems?
I use pixhawk 6C mini.
thanks.

Use Mission Planners Motor Test function to test motors. Use of the transmitter on the bench doesn’t tell you anything.

In other words, that is not a problem. That is expected behaviour.

Use Mission Planners Motor Test function to test motors.