Gear S3 show activity from last night while I was asleep

[elvilbur]

I got my S3 yesterday. Needs some adjustments but seems good.

Last night my S3 was on charging station and I went to sleep around midnight. Woke up this morning at 9:00. While I was asleep my S3 detected activity. From 1 minute to 18 minutes. I woke up several times during the night and my dog walked around the flat. This should not affect on activity? I did not have any sleeping tracker enabled :-/

Any thoughts?