When I tried to reply to the question in the thread below, my Quote reply was flagged as Spam. Was able to reproduce this a few times.
https://forums.imore.com/ask-question/398335-activity-app-not-linking-all-workouts.html#post3029084
https://forums.imore.com/ask-question/398335-activity-app-not-linking-all-workouts.html#post3029084