Download map stop at 17%

There are several post about Downloading TopoActive maps not responding queued or very slow.

I have observed another situation. After selecting what I want to download in GCM and plug charging cable I can agree or not to start downloading.

It works quite slow, but that is still fine, but after some time in my case about 30 minutes screen keeps showing no progress. 17% and not going forward.

I can wait long and nothing will change.

Then I can press Back button, watch will ask if I want to stop sync (why not to stop download?) and return to normal operation.

When I connect watch next time to charging cable, even few minutes later I can see eg. rapid progress to 34% then steady slow download going forward 35, 36 etc

And then again after some time it stops, but I guess it is still downloading just screen is not updated.

Could you reply here with +1 if you observe the same thing?

how we should report this if there will be several similar observations? Each one of us via Support? It is probably not new bug related to beta 19.12

Thanks