Looks like it’s known and a fix incoming:
“ Hi Mark,
Thank you for contacting Wahoo - I’m so sorry for the experience with your activity sharing to Strava.
We made some changes to the Strava sharing process, and it is clearly not working as intended. Our product team is aware of the issue and is working on a resolution. Once we have this resolved and activities are sharing correctly, I’ll send you an update.
Thank you so much for your patience as we get this sorted.
Cheers!”