ap.play() function not work

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ap object refer and then play function invoke. but, it did not work....

I think it works normally when there is only one element in the audio list, but when there are multiple elements like in the picture, it doesn't seem to work. Please confirm.

If you want to report a bug, please provide the following information:
- ap player setting and refer and play function invoke
- A minimal demo of the problem via https://jsfiddle.net or http://codepen.io/pen if possible.
- Which versions of APlayer, and which browser / OS are affected by this issue?
ap version: 1.0.1