http://www.techradar.com/news/google-device-disrupting-your-wi-fi-a-fix-is-on-the-way

If you’ve noticed that your Wi-Fi has gone a little funny recently, and you’re the owner of a Google smart speaker or Cast device, the two may be connected.

The good news is, Google is aware of the issue and “is working quickly to share a solution”. That’s according to an official Google spokesperson.