Slitherine

Hi, strange issue. When I login to multiplayer I see the game ( desert squadrons). I select it and it loads a screen where I can see the previous screen and on the right the menu with all the buttons and mini map but the mini map is black and pressing buttons do nothing but display the button name. The only way to get out is to double press the home button and swipe away the game. Then reload it. Other multiplayer games still function.