Some sources not showing up on map

[bertday]

Describe the bug
Some valid/active sources don't appear as green regions on the map.

To Reproduce
Steps to reproduce the behavior:

1. Go to the batch page
2. Scroll down to the map
3. Pan/zoom to Dauphin County, Pennsylvania (just one example, screenshot below)

Expected behavior
I expect Dauphin County to be shaded green, since it has recent successful runs.

Screenshots

Additional context

I'm finding a number of U.S. counties that are actively updating in OA but not showing up on the map. A few more examples:

• Hardin County, KY
• Northumberland County, PA
• Cambria County, PA

I originally opened an issue for this at openaddresses/openaddresses#6224, but realized it had a better home here.

Happy to help with this any way I can!

[bertday]

It looks like this could either be...

• An underlying data issue (see query here in /api/lib/types/map.js)
• A caching issue (see cache fetch here in /api/routes/map.js)