The issue seems to be solved. I have logged out from the wahoo app and restarted my Ipad. After logging in in the Wahoo app agin the problem was no longer there. Also maps from past rides were ok again.
I had a similar issue with maps not showing in the Wahoo app, so it does sound like it may have been a temporary cloud problem. Good to know that logging out and restarting the device helped in some cases. I’ll keep that in mind if the map disappears again.