Halo Wars 2 save data not downloading for PC W10

I have been playing Halo Wars 2 (digital purchase) on my Xbox One for quite a while.

I just ‘discovered’ that I can download and play it on my PC (yes, I’m a bit slow). I have downloaded the game on my Win 10 PC.

But when I launch the game on Win 10, it does not download the save file from the cloud and it’s essentially a brand new game save. I’m logged into the same GamerTag and I can see that the Daily and Weekly Challenges that I have completed on my Xbox One is showing as completed in Win 10 version of the game.

Halo Waypoint still shows my campaign progress as well as unlocked skulls etc. I have logged back into my Xbox One and the game still has the correct save (all missions unlocked, all skulls unlocked etc).

Is there a way to force the Win 10 version to download the latest cloud save so that missions/skulls are unlocked on my PC as well?

Thank you.