I am currently trying to render a video of startrails using AE. I have been adding 4 keyframes (a set to ramp up accumulation from 0-95 and then another to bring it back down from 95 to 0). Whenever the video reaches the second keyframe (arriving at 95), the effect appears to cut out very briefly, and then come back in. What it looks like is a gradual ramp up to star trails, then a flicker and a continuation of the star trails. I have tried rendering with the keyframes set on just about every possible setting and have looked online for a solution, but no matter what I do it still seems to persist. The other effects I am using in my video are time stretch, motion blur, and warp stabilizer.