streaming not working under lockscreen

Hi, I have a Nokia Lumia 930 running Windows Mobile10. Recently when using the BBC iPlayer website (via Edge) and streaming an audio file, if I turned the phone off (or the screen timed out), the file would continue playing until it was finished. Recently, when the phone is tuned off (or the screen times out), the file stops playing which is annoying. Has something in Edge or WM10 changed?
Thanks

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