DVR Playback Freezing

My recordings from the DVR (HDHomerunConnect) seem to be corrupted somehow. Several times per show the video will freeze, I can scrub forward a few seconds and they continue, but if I rewind back to the point where the video froze it will freeze again.

This is in the middle of segments, and the commercial removal seems to be working fine, but having to skip 30 seconds manually four or five times per show is making this thing very inconvenient.