My Mavic controller has been acting up out of nowhere. It takes numerous attempts to get it to turn on, even though it has a full charge. The lights in the screen are in, but it won't fully boot up. I eventually get it on by launching the drone and pushing the power again. Conversely, the controller will NOT shut after after my flight. I turn the drone off, but the controller won't shut off until 10-15mins of inactivity, and then an alarm beeps and it finally shuts itself off. It's never dont this before until now. Any ideas?