This map issue is This is the thread for Advanced LifeMap problems
I’ve got @andrew & @aaron.schinkowitch & @aidangrant & @jpbari & @davemorin accounts going on a full history sync now. I’ve disabled the ‘Run History Sync’ button for you, that I’m about to mention 
The underlying process (right now) is that it requests 90 days of activities (Garmin-imposed restriction), then schedules itself to ask for another 90 days in 1 hour, and repeats until it gets back to 2004 (Garmin’s suggested “earliest data available” year).
Anyone else who has a Garmin account connected - there’s now a ‘Run History Sync’ button available on your Settings page. You can only do this once, because it queues up the full history sync mentioned here. So go ahead and click that button if you want your full Garmin history in CityStrides.