When I synced this morning I got the popup message that processing will be slow and to check back later. Well, it's been more than 3 hours and still nothing shows.
Does anyone know what's going on?
All-
We are aware of an issue on November 3rd where wellness data (heart rate, body battery, stress, steps, etc.) were not syncing completely to Garmin Connect Web/Mobile and apologize for this inconvenience…
I agree that Garmin Connect is broken, but Garmin thinks otherwise. I do wish they'd get a grip.

I sync multiple times per day. It's only today that's an issue.
Actually, five hours after my first sync failure of the day, I've just synced successfully, at last.
I still lost 2 days it seems...
Wiped my phone so didn't sync through garmin mobile since sunday (did an activity which synced over wifi afterwards). Todays and sundays data is now visible in garmin but monday and tuesday are still empty.
Meh, ah well.. not the end of the world