How to include a leaflet map in Quarto closeread document?

I'm making a Quarto document with the closeread "scrollytelling" extension. Right now, when I attempt to create a leaflet map from an R code chunk, the resulting HTML file does not show the map. Do you know what I'm doing wrong?

Example:

---
title: "Untitled"
format: closeread-html
---

:::{.cr-section}

:::{#cr-leaflet}
```{r}
library(leaflet)
leaflet() |>
  addTiles()
```
:::

Lorem Ipsum. @cr-leaflet

:::

This results in a blank document like this, without the expected leaflet map.

Exporting the map as a standalone HTML-widget and then embedding it works.

---
title: "Untitled"
format: closeread-html
---

:::{.cr-section}

:::{#cr-leaflet}
```{r}
library(leaflet)

map <- leaflet() %>% addTiles()
temp <- tempfile(fileext = ".html") # temporary file
htmlwidgets::saveWidget(map, temp, selfcontained = TRUE)
htmltools::includeHTML(temp)
unlink(temp) # unlink temp file
```
:::

Lorem Ipsum. @cr-leaflet

:::