Sony Z7U owners.... missing clips???

This is a new one on  me. Just going thru an edit, after having transferred the files from the CF card to the Avid, looking for a specific shot... It's not there. I know I shot it, and it's on the MiniDV tape I shot simultaneously. The shot before it is on the card as is the shot after, just not that shot.  I have another shot I know I took, a wide shot of an entrance, but can't find that one in the bin ( I copied them all after importing from the CF card using the Sony utility.) Again the shots before and after are there ( Ihaven't checked the tape on that one yet.)

Anyone else experienced this?  Thankfully it's on the tape, but it worries me that it could do something like this... I'd had to miss critical shots because of some glitch.