Vivofit goes into pair mode for no reason

I recently got the Vivifit 4 and overall, I'm very happy with it.  However, sometimes when I'm syncing, it will randomly go into pair mode and then I lose all my data for the day.  It breaks my streak and ruins my statistics because I have a day where it looks as though I did absolutely nothing.

Has anyone else experienced this?  Any idea why this is happening?

It's happened three times now and it's very frustrating.