Last week on a video shoot using my 3rd battery, my P4 gimbal tilted when rolling the aircraft left and right.  It would stay on that angle.  Also, it made a high shrill noise.  I was using the Neewer ND-16 filter made for the P4.  I then rest the aircraft for 20 minutes and it returned to normal and flew one more flight.   I use the stock DJI P4 gimbal guard and the stock props are balanced. Hence, I believe it may have overheated.  I recal'd the gimbal and IMU after the flight.  I am watching for a tendency here but this is the second camera for this unit and it was installed by DJI in April.   I have read other posts that say you should rest the P4 after 30-40 minutes of shooting.  I will watch this over time.  Attached is the link to a the video link edited with FCPX and Compressor.  Safe Flying.

Tilting

It looks like you might have FPV mode set to 'ON'.   This mode allows the horizon to tilt in order to provide a 'pilots view' when flying FPV.  

The setting is found in the Gimbal options in the DJI Go app...

jwt873@gmail.co Posted at 2016-5-29 09:22
It looks like you might have FPV mode set to 'ON'.   This mode allows the horizon to tilt in order t ...

Hi.  I have a Phantom 3 Pro and a Phantom 4.  FPV mode does not seem to work?  Any ideas?  I have button 2 set to change this.  Also I have tried via the gimbal settings.

Like jwt873 said - it looks like you accidentally hit the C2 button (default operation) and triggered FPV instead of follow mode.

Hello ChiefPilot, your gimbal was probably in FPV mode at that time.

DJI-Paladin Posted at 2016-5-30 14:50
Hello ChiefPilot, your gimbal was probably in FPV mode at that time.

Thanks,  aviation is humbling and you learn something each time you fly.