Columns not rendering in .pdf

[giorgiopaulon]

Hi all!

I am working on a Quarto template that can render many features across several output types, i.e., .pdf, .docx and .HTML. One of the features that I am not able to export correctly is a list of items in a column environment. This shows correctly in the HTML but not in the .pdf generated by Quarto (as seen in the pictures below).

I attach below a reproducible example. Am I missing something?

---
title: "Columns"
format: 
  # html:
  #   self-contained: true
  pdf:
    documentclass: article
---

:::: {.columns}

::: {.column width="50%"}
-   [ ] Item 1
-   [ ] Item 2
-   [x] Item 3
:::

::: {.column width="50%"}
-   [x] Item on the right
:::

::::