Not necessarily missing activities, but missing streets. I have an activity today where I picked new streets and when I hover on the activity, it is clearly the only time I have been on that street but it is not registering as progressed or completed. I have a Garmin and synch with Strava.
Maybe just a delay, wait a couple of hours and check again
It’s been almost 24 hours and still no
Better is to check if you can find the street under that city. And there press the “GO” button.
- it will tell you if the street is properly registered in OSM, to this city
- It will show you all the nodes related to that street.
This will give some insights what might be wrong here.