Figure layout does not work properly with format docx

Bug description

When trying to use multi-figure layout for a docx format output, the subfigures do not end up arranged as expected

Steps to reproduce

---
title: "Figure layout doesn't work properly in quarto >> docx"

format:
  docx:
    toc: false
    number-sections: true
    number-depth: 1
    highlight-style: github
    fig-dpi: 600
---

# Here is a figure layout following the example in the quarto docs closely    

Refer to the figure [[@fig-test]]?  

::: {#fig-test layout="[[-20, 60, -20], [45, -10, 45]]"}

![Patient Summary](IMAGES/fig1.png){#fig-summary}

![Birth History](IMAGES/fig2.png){#fig-birth}

![Gait Development](IMAGES/fig3.png){#fig-dev}

Add to the list of problems trying to use Quarto with MS Word
:::

the figures are ordinary png files

Another "clue" - if I remove the sub-figure references (i.e., {#fig1-summary, etc...} it STILL doesn't work, but it gives a different wrong answer.

Expected behavior

Well, it's an overstatement to say I "expected" it to work like the examples in the docs. After all, I've used quarto with docx format for a while, and have come to learn to expect the unexpected.

But, yeah! I guess I thought it might give me nicely laid out figures.

Actual behavior

Here is the output from the reprex above:

Here is the output if I remove the sub-figure references:

In some topological sense, I guess it's closer, but on the other hand it is cropping off images.

Other things, linke trying layout-ncol=2 and so on fail in equally "entertaining" ways.

Your environment

• IDE RStudio
  2023.12.1 Build 402

• OS Windows 10 Pro
  

Quarto check output

[>] Checking tools....................OK
TinyTeX: v2023.11
Chromium: (not installed)

[>] Checking LaTeX....................OK
Using: TinyTex
Path: C:\Users\mschwartz\AppData\Roaming\TinyTeX\bin\windows
Version: 2023

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

[>] Checking Python 3 installation....OK
Version: 3.11.6
Path: C:/Users/mschwartz/AppData/Local/Programs/Python/Python311/python.exe
Jupyter: (None)

  Jupyter is not available in this Python installation.
  Install with py -m pip install jupyter

[>] Checking R installation...........OK
Version: 4.2.2
Path: C:/PROGRA1/R/R-421.2
LibPaths:
- C:/Users/mschwartz/AppData/Local/R/win-library/4.2
- C:/Program Files/R/R-4.2.2/library
knitr: 1.45
rmarkdown: 2.25

[>] Checking Knitr engine render......OK