Usage of third party apps can be one of the many factors which caused halved rewards. Few years ago I remember that when I used faucet rotator to claim from freebitco.in, rewards were halved, so after few claims and I stopped to use rotator and then everything back to normal. Now their system flagged lot of accounts due to various reasons and now they have manually whitelist legit accounts. It would be best to not use unofficial apps, it's also can be unsafe - it's possible that they can steal your login details and withdraw your BTC.