Cross-Reference Div Syntax Python example does not work

I have:

• searched the issue tracker for similar issues
• installed the latest version of Quarto CLI
• formatted my issue following the Bug Reports guide

Bug description

Cross-Reference Div Syntax Python example does not work

Steps to reproduce

[tmp.qmd]
::: {#fig-line-plot}

```{python}
import matplotlib.pyplot as plt
plt.plot([1,23,2,4])
plt.show()
```

A line plot
:::

quarto preview tmp.qmd

Actual behavior

Starting python3 kernel...Done

Executing 'tmp.quarto_ipynb'
  Cell 1/1: ''...Done

Rendering qmd embeds [tmp.qmd]
Error running filter /opt/quarto/share/filters/main.lua:
/opt/quarto/share/filters/main.lua:22970: attempt to index a nil value (field 'content')
stack traceback:
        /opt/quarto/share/filters/main.lua:1213: in local 'filter_fn'
        /opt/quarto/share/filters/main.lua:653: in function </opt/quarto/share/filters/main.lua:643>
        (...tail calls...)
        ...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:34: in upvalue 'run_filter_function'
        ...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:223: in function <...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:202>
        (...tail calls...)
        [C]: in function 'tmap'
        ...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:125: in upvalue 'recurse'
        ...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:222: in local 'jogger'
        ...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:98: in upvalue 'recurse'
        ...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:222: in function <...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:202>
        (...tail calls...)
        [C]: in function 'tmap'
        ...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:125: in upvalue 'recurse'
        ...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:222: in local 'jogger'
        ...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:171: in upvalue 'recurse'
        ...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:222: in function <...uarto/share/pandoc/datadir/../../filters/modules/jog.lua:202>
        (...tail calls...)
        /opt/quarto/share/filters/main.lua:572: in function </opt/quarto/share/filters/main.lua:550>
        (...tail calls...)
        /opt/quarto/share/filters/main.lua:1314: in local 'callback'
        /opt/quarto/share/filters/main.lua:1332: in upvalue 'run_emulated_filter_chain'
        /opt/quarto/share/filters/main.lua:1368: in function </opt/quarto/share/filters/main.lua:1365>

Expected behavior

A figure should be rendered

Your environment

• IDE: VS Code, though this example was using just the CLI
• OS: Ubuntu on WSL

Quarto check output

Quarto 1.8.26
[✓] Checking environment information...
      Quarto cache location: /home/hafarooki/.cache/quarto
[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.6.3: OK
      Dart Sass version 1.87.0: OK
      Deno version 2.3.1: OK
      Typst version 0.13.0: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 1.8.26
      Path: /opt/quarto/bin

[✓] Checking tools....................OK
      TinyTeX: (not installed)
      Chromium: (not installed)

[✓] Checking LaTeX....................OK
      Using: Installation From Path
      Path: /usr/local/texlive/2025/bin/x86_64-linux
      Version: 2025

[✓] Checking Chrome Headless....................OK
      Chrome:  (not detected)

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
      Version: 3.13.8
      Path: /home/hafarooki/projects/data-analysis/venv/bin/python
      Jupyter: 5.9.1
      Kernels: python3, epthermo_kernel, pymfrenv, venv_kernel

[✓] Checking Jupyter engine render....OK

[✓] Checking R installation...........(None)

      Unable to locate an installed version of R.
      Install R from https://cloud.r-project.org/