It has happened to me several times while cycling that the heart rate graph in the watch is correct see picture but in sync in Garmin Connect both Mobile and Web the graph is rendered wrong see pictures.
I am quite annoyed because I use sync to other apps (all day).
The interesting thing is that it doesn't happen for example when walking and at the same time it happens randomly. Sometimes not even part of the day's progress is transferred but everything is fine in the watch.
Thanks in advance for the advice or fix.
With best regards Radek
My profile Garmin Connect
