I'm having problems with playblasting my animation. For some reason, every 20 frames or so, it flashes a blank, grey frame. Have no idea why... any suggestions on getting rid of this? All the frames are there when I scrub through it so I'm sure it would render fine. Though its frustrating when trying to evaluate my animation.

Also.. I started animating with the Moom rig on high-res to start because I hated trying to picture hand/finger movements on the lower res model. Though now it's really slowing down my animation.. anyway to get it back to low-res? Tried on the moom shelf icon, though once I change the frame it goes back to high. Help would be much appriciated!!