Update - HR and Body Battery

Is anyone having any strange HR readings and body battery output. I get the odd “abnormal HR alert” HR reading at 130 when not moving. I can take my own pulse and I am pretty sure it is well under 100. If I take the watch off and put it back on again it reads 60-70 pretty instantly. 

My body battery has been in the 20s for a week. 

I am trying to work out if it is my watch (which I think it is) or I am ill. I am sure I would be aware if my heart was beating at 130 while lying or sitting. 

David