Text in pattern upside-down after PDF import

Summary:

(Maybe related to or same as #2615, but even if so, this is a much simpler demo.)

After importing pattern.pdf via "Internal import", Inkscape shows the text upside down.

The import preview is correct. If importing via Poppler/Cairo, it's correct. Other viewers I tried (okular, ImageMagick, firefox, chromium) also render it correctly.

pattern.pdf was generated with rsvg-convert version 2.50.3 or 2.52.5:

rsvg-convert -f pdf -o pattern.pdf pattern.svg

pattern.svg is rendered correctly by all programs I tried, including Inkscape.

Steps to reproduce:

• open Inkscape
• import pattern.pdf

What happened?

Text shown upside-down.

What should have happened?

Text shown upright.

Sample attachments:

pattern.svg pattern.pdf

pattern.svg:

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 100 100">
<pattern width="100" height="100" patternUnits="userSpaceOnUse" id="t">
  <text font-family="sans" font-size="50" y="50">Test</text>
</pattern>
<rect width="100" height="100" fill="url(#t)"/>
</svg>

Version info

Inkscape 1.0.2 (e86c870879, 2021-01-15)
    Pango version: 1.46.2

also:

Inkscape 1.1.2 (0a00cf5339, 2022-02-04)

     GLib version:     2.72.1
     GTK version:      3.24.33
     glibmm version:   2.66.2
     gtkmm version:    3.24.5
     libxml2 version:  2.9.13
     libxslt version:  1.1.34
     Cairo version:    1.16.0
     Pango version:    1.50.6
     HarfBuzz version: 2.7.4
     Poppler version:  22.02.0

     OS version:       Ubuntu 22.04.1 LTS

also:

Inkscape 1.3-dev (e533fbf, 2022-10-11)

     GLib version:     2.64.6
     GTK version:      3.24.20
     glibmm version:   2.64.2
     gtkmm version:    3.24.2
     libxml2 version:  2.9.10
     libxslt version:  1.1.34
     Cairo version:    1.16.0
     Pango version:    1.44.7
     HarfBuzz version: 2.6.4

     OS version:       Ubuntu 20.04.5 LTS