weird flikering animation with foliage

Hello guys.

I am running in a very annoyng problem with an animated foliage sequence.
I can’t really render it properly and every time i hit render in the render queue i get a strange flikering animation.
It looks this happn only in the foliage object, but in the viewport everything is looking good and animated properly.

Someon can help me in solving this issue?

thank you.