I'm seeing a strange problem on an HVX170, with a 64gB P2 card shooting 720/24pn. It seems to record 4 frames, then jump about half a second, then record 4 more frames, etc. etc. however, audio records continuously, and timecode is continuous. It reads as 24fps when bringing it into an editing program. Has anyone experienced this before? Hoping the card isn't busted.