*UPDATE* This issue has now been resolved.
You may have noticed a slightly different map today, where hexes have different shading (see screenshot below).
This is happening because we've made a few updates to the game server and to the corresponding iOS build, but the new build has not been deployed yet.
We should be deploying the new build over the next 24 hours, which addresses this issue and brings the view back to normal.
Don't worry, your progress has not been affected in any way!
Here's a screenshot of the issue: