Strange whitespaces in my highlight

[jywhy6]

website: https://www.w3.org/publishing/epub32/epub-packages.html
I highlighted several sentences in this website, for example: The package element is the root element of the Package Document and defines various aspects of the EPUB Package
However, the synced highlight text becomes:
As you can see, there are strange whitespaces.
I have checked on my personal page to make sure that the highlight text on hypothes.is server does not have so many whitespaces.