Listening to the 9/10 Bombcast via the website's built in audio player and I just noticed every time I change the volume via the volume control on the page the audio pauses itself. I assume it's registering the click from changing the volume and passing it through to the big play/pause button on the page where the thumbnail for the episode is. Let me know if you want screenshots or any additional info and I'd be glad to assist.
Some tech specs: Running latest Mozilla Firefox (69.0) on Windows 7. I have uBlock Origin but disabling it has no effect.