UserAgent: Mozilla/5.0 (X11; CrOS x86_64 8872.76.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.105 Safari/537.36
Platform: 9000.82.0

Steps to reproduce the problem:
1. Ensure one of 2 or more Chromecasts are being Cast to on the network
2. Attempt to Cast to one not being used

What is the expected behavior?
Once Cast is selected, the menu should revert to the list, not the controls for a Chromecast in the other room.

What went wrong?
You're unable to select the room you're in, as it assumes you're in the room where a Chromecast is already being used, as if there is only one user.

Did this work before? Yes 55

Chrome version: 56.0.2924.87  Channel: stable
OS Version: 56.0.2924.87
Flash Version: Shockwave Flash 24.0 r0