There seems to be an issue with matching Wahoo and Strava activities.
I am only back to outdoor cycling very recently, and it seems that watching Wahoo and Strava files of the same activities often does not work 
I.e., I get separate i.icu activities for the files/data from Wahoo and from Strava…
Despite the data being very similar.
Expected to get a “merged activity” with the data from Wahoo and the link and metadata to/from Strava.
One examples are todays activity(ies) 11462769473 and i40287165:
Again, it would be a viable solution to be able to manually merge such activities;-)