Crash in auto mode


I tested my f450 copter 3 times in auto mode with pixhawk APM 3.3.3 firmware successfully.

A few hours ago, I flied my copter for get a video with my gopro camera and feiyu 3d mini gimbal.

But suddenly, it was dropped and crashed.

Sadly, my camera and gimbal were destroyed.

I want to know the reason why it was dropped.

My log file is attached in below.

please let me know the reason.

Thank you in advance.

looks like you had a mechanical issue as the copter was making uncommanded movements, it looks like your motor or esc 1 started having a problem, check out connections and stuff like that or you have bad motor or esc

Where is the log file , may be i could help you?