This started happening after a new feature was added in the Bonus. I cluck on "Free Moves", watch the ad, and once the ad completes, the screen goes black. I think someone messed up iwhen they added this new feature. Remove the feature until it is thoroughly tested.
When is the issue with the ads going to be fixed? It has gotten to the point where I can't even play Candy Crush. Please just fix the software and stop making excuses.