I noticed that SVGs with text having unicode characters of the combining diacritical marks block aren't rendered well on Wikimedia Commons into PNG when the with of the rendered image doesn't fit to the specified with of the SVG. Take for example File:SVG with combining diacritical marks as unicode characters (test image).svg Rendered in its specified width looks fine (link to rendered PNG):
But the accents doesn't fit to the x character when the rendered PNG image width doesn't match the SVG width. Take for example the png image with 2000px width:
As you can see, the accents are moved to the right (by the way the accents are moved more to the right the bigger the gap in the width is). For smaller PNGs the accents are moved to the left (image with 250px width):
I have created File:SVG with combining diacritical marks as unicode characters (test image).svg for this bug report. So feel free to play with this file, upload new versions and delete the file after this bug is resolved :-)
By the way: I came across this bug after uploading File:Illustration of differential quotient 7.svg and similar images which use the x tilde character.
Duplicate of T36947 & T205776
Reported Upstream: https://gitlab.gnome.org/GNOME/librsvg/-/issues/730 ; fixed in librsvg 2.51.2 and 2.50.6