You may notice that within the recorder, when playing back the most current recording, the progress counter and bar take a few seconds to get started properly
There is a reason for this. The audio or video is not a file at that point and does not have file headers. So the player does not know how to calculate the length and point of progress of the audio. It gets through a little bit of playback and then can estimate it.
Since we recorded it, we do know the playback time. Thats why it shows until you begin the playback. We just can not get that information through to the player (yet).