wrong sizing of \Vert with \left and \right

Created by: mbotsch

Issue Summary

Sizing \Vert with \left and \right does not work properly after switching to version 3.1.4.

Steps to Reproduce:

Try the following, e..g, on the demo page https://www.mathjax.org/#demo

$$\left\Vert V \right\Vert$$

Left and right Vert should be the same size, but the right one is smaller or (depending where this is in a complex equation) both Verts are too small. This used to work in version 3.1.2. In contrast, using \vert instead of \Vert works as expected.

Technical details:

• MathJax Version: 3.1.4, SVG output
• Client OS: Mac OS X 10.15.7.
• Browser: latest Chrome, Firefox, Safari