I may have found a new version of this related to challenges. I’m taking a second lap around my city and have found or updated many spots after my runs. I see many of these OSM edits appearing as red nodes in places I’ve already covered. An example:
Challenge: CityStrides Lets (re)run PVD
Street I’d updated (added correct name): Arlan Way - CityStrides
Map view:
Let me know if other data helps, there may be a couple dozen like this?
Challenges don’t get touched from the city updates 
I’m going to split this off into its own thread so that I can keep track of it
For anyone following or interested, it’s a simple enough fix (for a solo project) to recreate the challenge and back date the start time to the original.
I was able to spend some time today updating the city sync process to also reprocess Challenges. That update is being released now.
Funny enough, it was least complicated to basically do the same thing you mention - I just send through the same code that runs when you create/join a Challenge.
