Mobile scroll bar should not take up page space - it causes wrong design implementation

The scroll bar in the Pinegrow preview is counted as part of the website and is taking up horizontal space that would, in reality, be usable.

For instance, I often rely on the “vw” unit to size text, and this is how it looks in Chrome (and how it should look):

And this is how it looks in Pinegrow:

In both examples, the text is physically the same size, but in Pinegrow, the scroll bar is “eating up” space on the right forcing the text to break into a new line.