Hi, there is a small visual glitch on mobile app (I use Android), while upgrading resource fields, the shown level of upgrade is +1 than a correct one, doesn't impact resource consumption or anything else though.
Same is happening to me, sometimes its even +2.
And if you have a wall lvl 0, you can't upgrade it from the app, as it says that the building does not exist.
EDIT: also android
Mobile app (android) may need some detailed testing. Few issues i have see in Android App
1) As a duke, i am unable to collect tributes
2) When trying to sell stolen goods from Hero inventory, the amount of crop is not shown. But once you sell it, the shipment includes the crop along with resources.
3) Building level upgrades in the visual display - its not just for resource fields, same problem for buildings as well