I joined the mission on Tuesday on my iPad and did 30km but the mileage never showed in the mission countdown on the start screen after saving. Today I did another 40km, also on the iPad, and after saving went back to the start screen and the mission countdown was still at 0/112.
On my lunch break I did a quick 3km test on the Apple TV. After saving and going back to the start screen the mission countdown showed 1.9/112.
I haven’t tried on my iPhone, but will later, so I don’t know if it’s an overall iOS issue or just on the iPad.
I already submitted this via the support page but that was before confirming that it was working OK on the ATV.
I hope this can get resolved soon, and that I can get credit for the 70km I did.