MAKE IT BETTER IN IPHONE 6

I LOVE THIS APP SOOOO MUCH IS THE BEST DRAWING/PHOTOGRAPH EDITING APP EVER AND IT WORKED PERFECTLY ON MY IPHONE 5s BUT DOESNT WORK AS WELL ON MY NEW IPHONE 6, WHEN I TRY TO UPLOAD A PHOTO IT LETS ME, BUT WHEN I TRY TO UPLOAD ANOTHER PHOTO EVEN IF I HAVE DELETED THE PHOTO I WAS WORKING WITH THE SCREEN TURNS BLACK SO I HAVE TO KEEP CLOSING THE APP TO START WITH A NEW PICTURE !! PLEASE FIX IT

NIGSWA about LINE Brush