Adding BBC radio streams play but won’t stop

I noticed that BBC Radio 2, 3 and 4 play at 128kbps in the Volumio Selection so I added the BBC’s 320kbps streams to My Web Radios which play fine but the only way I can stop them is to reboot (RPi using v2.729). The displayed info also doesn’t change when one of these higher res streams is selected. Any ideas?

This is the BBC Radio stream address:

a.files.bbci.co.uk/media/live/ma … o_two.m3u8