Steps to replicate the issue:

• Upload the SVG file with following codes

<?xml version="1.0" encoding="utf-8"?>
<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 50 50">
 <defs>
  <text id="no_g_text" x="5" y="20">no g</text>
 </defs>
 <use href="#no_g_text"/>
 <text id="with_g_text" x="5" y="40">with g</text>
</svg>

What happens?:
https://commons.wikimedia.org/wiki/File:Librsvg_bug_nested_use_(2).svg

What should have happened instead?:
<use> element with href attribute should be works the same as that with xlink:href attribute. As the xlink:href attribute is labeled deprecated, any file used href attribute should be respected.

Software version (skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):
Documentation at MDN Web Docs: https://developer.mozilla.org/en-US/docs/Web/SVG/Element/use