Body battery/stress/Heart rate data missing after midnight

Hi Everyone, 
I am missing all data from midnight till when I woke up this morning. It doesn't seem to have synced across to my phone. It only starts displaying data after I work up when the alarm went off. Strange part is that all the data is in the watch. Heart rate, body battery, stress is all there on the watch. But for some reasons they are missing from the phone and website. 
Also strangely my sleep data was successfully synced to the phone. 

Any ideas of what might have caused this?