Describe the bug
Iris enabled Icecast stream is not playing in the Iris window.

Although, in browser's ( FF or Chrome) console debug mode one can see a repeating messages eg.
Attempting to play stream http://192.168.1.3:6881/mopidy?cb=1589185607952

Stream can be played and heard when user clicks the example url from the debug console and opens in a new tab, proving that streaming is working fine.

To Reproduce
Steps to reproduce the behavior:

1. Go to Settings
2. Click on Icecast
3. Check play stream to this browser
4. Input stream url in the field below
5. Optionally Refresh tab

Expected behavior
A stream should play in the same window / tab as Iris.

Screenshots

Icecast is enabled:

Console view:

Stream is playing fine in a separate tab:

Environment details:

• OS: Osx / Windows 10
• Browser [Chrome, Safari, Firefox]
• Iris version [e.g. 3.48.0]

Additional context
Tested in both incognito/private mode in both FF and Chrome (Safari is vanilla).