There are two other threads, one dating back to last December, concerning this issue. It is not new.
I have 6 V3s, and none of them have ever successfully saved a recording from playback. The app says it did, but the resulting video file is always 0 bytes in length.
Edit: I have only Android devices, so cannot comment if this works with iOS devices. My v2 and Pans can record from playback with no problem; it is only the V3s that cannot.