As you're aware, we've been working on a new retargeting algorithm  to try and  defeat Nicehash and other mining pools that are operating in a similar fashion. If you've been keeping tabs on the github repo you'll notice quite a bit of activity today, and these changes are currently being tested to ensure we can roll out across the network. I'm hopeful we can implement within the next day or so following an official announcement. Thank you for your patience.