VFB automatic cancel in somes frames for animation mode

[PablonchoWorks]

Problem in animation.
The vray frame buffer was automatically stopped on frames 14/15/17/19 and 43 of 130.
See color bar screens on aftereffects and the problem directly on frame 14 in Blender.
Sorry for my english! its to bad!
https://youtu.be/WiUeS1okB2Y