Please help me // Sudden change in gimbal pitch !!

[Xblog]

i have a problem : Sudden change in gimbal pitch without any change on the controller (see videos)
and it's the second time, dji exchange (warrantly) mavic, but with second mavic I have the same problem.
have you an idea ? and have you this problem with your mavic ? perhaps it's bug from software...

First mavic :

Second mavic :

and a video from another user, i find on youtube :

 

[Xblog]

any idea specialists @Robbyg or @Thunderdrones or @Bunny Too ?
thanks all !

 

[CQi]

experienced the same issue as of today