3rd time this week. Wake up with a body battery of 85. Go on a walk (started a recording with the forerunner 265). 30 minute walk and m body battery shows 27. It did not rapidly go down over those 30 minutes, it simply drops nearly 60 points at the start.
Having this happen messes up my training readiness and makes the feature basically meaningless. I did not have this happen till thus week.
Seems like a bug to me? It's very consistent that it happens when starting a walk shortly after waking up.