Live loop quick start cards don't always stop when toggled off

I'm not exactly sure how they work behind the scenes, but so far, as far as I can tell, I can reliably reproduce this issue. If a live loop quick start card preview is toggled on with its play button, and you then start another live loop quick start preview while the first is still playing, the sound switches over to match, as you would expect. However, you are no longer able to stop any of the live loop quick start previews by toggling their play buttons off - only by hitting the global stop button or shortcut. If you only toggle a single live loop quick start preview on and off at a time, it works as expected.