Audio working on Timeline but not once published

I have one particular slide, out of 22, where the audio doesn't play once the project is published. The other slides work but not this one unless I pause the slide, play it again, then the audio starts running. If I don't do that, the audio just won't sound.

I inserted the audio from the Menu  Insert>Audio>Audio from file etc. etc.

What could be wrong with the slide?

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