Hallo,
today in the morning I made a health snapshot. When synchronizing my sleep data after making this snapshot using GC mobile I saw that the snapshot didn't appear. I looked into the web interface of garmin. There it didn't appear, too. So I opened the watch on my pc, copied this activity to my pc and tried to upload it using the web interface. But I got the error that this file was already uploaded, but it didn't appear in the frontend after this try. So it seems that the snapshot was really synchronized but not displayed in GC mobile and the web interface. Did anybody observe this kind of problem, too?