I cycle usually twice a day (commuting to and back from work). I've noticed a few days ago that calories burnt reported in "My Day" are wrong if there is more than one activity per day. In my case it shows only 2nd activity calories, not all activities added together.
I haven't updated Connect IQ for within recent days, but the problem came out. So perhaps it's something to do with Garmin Connect platform, not only the IQ app. Not sure.
I've just updated the app to version 4.47.2 (using Android 10). That didn;t solve the problem.
It was OK before, just last few days is wrong.