Iphone Xs Max Issue – iKeyboard -Cool Keyboard Theme Review

I love iKeyboard I have been using it for awhile now but I just recently upgraded to the iPhone Xs Max & now my keyboard doesn't stretch from end to end. The right side of the keyboard sits about a quarter of the way away from the edge. Please fix it wasn't doing this on my old iPhone.
Review by Cianume on iKeyboard -Cool Keyboard Theme.