Lose of control beacose lose of "Desired Pitch"

I am trying to build a 250 fpv racer:
[attachment=3]IMG_1194.JPG[/attachment]

After performing the main configuration and during the second flight I had a suden lose of control:
[youtube]https://youtu.be/U-V-qV7FA-Q[/youtube]

Looking at the data flash logs, I fond that the desired pitch suddenly goes to cero:
[attachment=2]pitch.PNG[/attachment]
It is probably due to an exceed of vibrations:
[attachment=1]vibrations.PNG[/attachment]

[attachment=0]15-10-02_14-59-04_1.bin[/attachment]

can someone confirm this, or point me to the right direction?

Thanks in advance