Slide layers and audio

I have these slide with layers.
When I click on one of the post it notes the audio in the main slide is paused. And the audio of the layers starts playing when the layer appears.

So far so good. My problem: when the layer is closed again the audio from the main layer does not continue where it was paused.

How can this be solved? For now I have written in my notes that the user must first listen to the end of the slides. This is not a solution. Can anyone help?


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