This is a Websockets issue. I have 9.0.375.0 and have been having a ton of problems with Zenhub, Usetrace and a lot of my other work software that uses Websockets. I finally just figured out how to use pre-release updates and I updated, seems to have resolved the Websocket issue. I am on 13499P(20160516) and I hope this gets pushed out to standard soon so I can switch away from pre-release...