"play radio" button does odd things

Procedure to reproduce:

• go to https://audio.gafamfree.party/library/radios (for example)

First issue:

• pick up a radio and press "play radio"
• observe that the button text switches to "stop radio", while the button style stays the same
• click anywhere on a blank area
• observe that the button style changes

Second issue: (solution : "enable/disable" rather than "play/stop")

• press "stop radio"
• observe the button state changes, but music keeps playing
• expected behavior would be that the playback stops when the radio is stopped

Third issue:

• that RSS icon

Fourth issue:

• radio may skip several tracks one after another

Fifth issue:

• radio would stop after too much failure #1709 (closed)