Hey friends,
Just a quick update from the Devs, there should be a fix the incorrect progress, coming soon! Hopefully it will recognise that you are playing between Steam and mobile after the update.
Note: You will need to play the game on Steam to progress that Achievement on Steam. We unfortunately can’t track progress across accounts due to Console Achievement Requirements.
As I mentioned earlier as Google Play/Apple are still tracked separate to Steam
Jeto - Support Team Member 