How to fix glitch with ads

Very frustrating glitch with ads. At the end of a turn, I watch the reward ads to get extra moves (or colour bomb or flying saucer or…), but when I click on the X after I’ve watched, it takes me back to ‘play’, so I not only don’t get the rewards, but also lose a life. This problem used to be intermittent – it’s now almost every turn. How do I fix this?