Ran my usual 5+ km morning run few hours ago, but this didn't give me the September Weekend 5K badge. I have joined the challenge, and my local time was 4:58 AM, 4th of September, so this should have triggered it. The activity did increase the progress of all other run-related badges, meaning that the activity is indeed a running-activity.
This hasn't happened before with any of the other weekend badges. Anyone else is having the same issue?