HRM 600 Sync Times

Hi there,

I’ve been using the HRM 600 on its own without a watch wearing if almost of the full day. Something I noticed is that the heart rate data seems to sync a few hours behind. For example I do my workout at 12pm but when I check the synced data it shows the heart rate for that workout at around 9 am.Has anyone else experienced this?

Ive had the HRM pro and pro in the past and have never encountered this