Body battery

I have been using the index monitor since July. 

I have the Fenix 6 pro and the Index sleep monitor. I use the ISM at night and take off my watch. 


When I use to just sleep with my watch the body battery used to track over night and show the increase.

 Since using the ISM i don’t get the tracking showing the over night increase. Once the ISM is synced with my app and then my watch, I just get the increased Start point for the day just no tracking line..

I assume this is the calculated correctly but wanted to check if this is normal behaviour 

thanks