Save-bug plz fix!!

One of greatest TD on iOS in my opinion!!! But....
....Last 2 updates still there is save-bug for me... After re-load earlier saved game Im trying to zoom-out on any map and after that ALL & ANY of buttons at the bottom are NOT make any action (new turrets buttons, option-button etc, air strike etc)!! They are just not respond! But still all builded turrets on the field are still available and clickable!!
So please fix that issue...
For now only 3/5 star (after fixing that, i will give 5 stars, that game is really deserve!)

Niko.in.UA about Defense Zone 2 HD