Single column PowerPoint removes images and duplicate caption

[mcanouil]

A bit Unorthodox but if one uses a single column with an image in it to output to PowerPoint, the image gets removed and the caption is duplicated.

Tested with pandoc 3.2.

Originally reported in Quarto:

• https://github.com/quarto-dev/quarto-cli/issues/10101

Input	Output
````md :::: {.columns} ::: {.column}  ::: :::: ````

[jgm]

Interesting. If you add another column containing text, there is no problem with the image.

[mcanouil]

The Quarto MWE:

Input	Output
````qmd --- title: "Quarto Playground" format: pptx --- ## Slide :::: {.columns} ::: {.column}  ::: ::: {.column}  ::: :::: ````
````qmd --- title: "Quarto Playground" format: pptx --- ## Slide :::: {.columns} ::: {.column} Text ::: ::: {.column}  ::: :::: ````
````qmd --- title: "Quarto Playground" format: pptx --- ## Slide :::: {.columns} ::: {.column}  ::: :::: ````