Over the last couple of days my Apple Watch activity rings have started to fill randomly when I’m doing nothing. It’s started happening since updating my iPhone to 12.1.4 and is even happening when the watch isn’t on my wrist. I noticed that the green lights on the heart rate sensor were lit up while the watch had been laying on my bed while I got dressed this morning. It seems to think that I did 27 minutes of exercise between 1pm and 2pm today while I’ve been sat watching the TV and eating lunch. The watch had a white version of the activity status icon at the top (see photo) and the heart rate sensor lights were active when I took the watch off from my wrist. The only app I can think that would have been activating the sensor would be Heart Rate Analyzer so I’ve removed it from the watch for now. Anyone else had the same issue?