Can't seem to find anything that would cause this issue. Everything appears to be fine in the viewport yet output is somehow "lagging" and "clipping". I have tried both quicktime video and photoshop sequence with no luck.
Hopefuly someone can point me to the right direction.
I forgot to mention that I was using Team Render function. I re-rendered the scene with regular one computer rendering with no problems at all.
Apparently one of the "work computers" is too fast and the main computer does not have time to convert the frame, therefore skipping it?
Id be happy if there were a solution to this without decreasing the amount of threads :/