Since my watch updated to the latest 25.10 the overnight sleep and body batter tracking seems not to work anymore. It's the second day in a row where my Garmin thinks I went to bed at 0.30 (1hour later than actual) and woke up at 4.30 in the morning (actually slept 3 hours more). Also the body battery has many gaps in the stress diagram and went up only to 50 even tough I had a good night.
And lastly HFV shows just 1 small line from the middle of the night. Yesterday and today also just 1 straight vertical line at about 02.00 in the morning from 50 to 65ish