If you are using a plugin like EWWW Image Optimizer, the image lazy load feature can break the beat player.
This happens because lazy load code is added to the beat player thumbnails, breaking it.
This can be fixed by adding these CSS classes to the Excluded Images or iFrames input.
thumb
plthumb
Once you add the two CSS classes above to the Exclusions input, save the changes and test the beat player.

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