Repeated href in sidebar navigation result in repeated text

[mine-cetinkaya-rundel]

Bug description

If the href is the same (either to a .qmd or to an external site) and sidebar navigation is used, the text of the second link is shown. This issue doesn't show up if navbar navigation is used.

Sidebar: The text "Link to Post 2" and "External link 2" is repeated.

Navbar: No repeated text.

Steps to reproduce

• quarto.yml for sidebar navigation:

project:
  type: website

website:
  title: "test-website"
  sidebar:
    contents:
      - href: index.qmd
      - href: posts/post1.qmd
        text: Link to Post 1
      - href: posts/post1.qmd
        text: Link to Post 2
      - href: https://google.com
        text: External link 1
      - href: https://google.com
        text: External link 2

format:
  html:
    theme: cosmo

• quarto.yml for navbar navigation:

``yaml
project:
type: website

website:
title: "test-website"
navbar:
left:
- href: index.qmd
- href: posts/post1.qmd
text: Link to Post 1
- href: posts/post1.qmd
text: Link to Post 2
- href: https://google.com
text: External link 1
- href: https://google.com
text: External link 2

format:
html:
theme: cosmo

### Expected behavior

I expected "Link to Post 1" and "External link 1" to show up in the navigation on the sidebar.

### Actual behavior

Repeated text

### Your environment

- IDE: RStudio 2023.09.0 Build 380
- OS: Mac 13.5


### Quarto check output

```bash
Mines-MacBook-Pro:test-website mine$ quarto check
Quarto 1.4.346
[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.1.6: OK
      Dart Sass version 1.55.0: OK
      Deno version 1.33.4: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 1.4.346
      Path: /Applications/quarto/bin

[✓] Checking tools....................OK
      TinyTeX: v2023.08
      Chromium: (not installed)

[✓] Checking LaTeX....................OK
      Using: TinyTex
      Path: /Users/mine/Library/TinyTeX/bin/universal-darwin
      Version: 2023

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

[✓] Checking Python 3 installation....OK
      Version: 3.9.6
      Path: /Library/Developer/CommandLineTools/usr/bin/python3
      Jupyter: 5.3.0
      Kernels: python3

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

[✓] Checking R installation...........OK
      Version: 4.3.1
      Path: /Library/Frameworks/R.framework/Resources
      LibPaths:
        - /Users/mine/Desktop/teaching/Duke/sta113-f23/sta113-f23.github.io/renv/library/R-4.3/aarch64-apple-darwin20
        - /Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/library
      knitr: 1.43
      rmarkdown: 2.24

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