The code for Dash scatter plot does not render the same as the example

On the tutorial page, the example interactive scatter plot is not produced when running the code that is shown for it. Specifically, bubble sizes are all one size presumably because size is set to a static 15. Also, upon hover, the bubbles do not show the same information or clean formatting as the example plot. I’m not quite sure how to get the dynamic bubble sizes and have tried a few different code snippets.