Setup-miniconda: Channels added twice

I'm seeing channels being added twice with this action, once under:

# Applying conda configuration...
#################################

and another under:

# Applying conda configuration after update...
##############################################

This results in warnings:

C:\windows\system32\cmd.exe /D /S /C "C:\Miniconda3\condabin\conda.bat config --add channels conda-forge"
##[warning]Warning: 'conda-forge' already in 'channels' list, moving to the top

Warning: 'conda-forge' already in 'channels' list, moving to the top
C:\windows\system32\cmd.exe /D /S /C "C:\Miniconda3\condabin\conda.bat config --add channels conda-forge/label/testing"
##[warning]Warning: 'conda-forge/label/testing' already in 'channels' list, moving to the top

Warning: 'conda-forge/label/testing' already in 'channels' list, moving to the top

The problem is that these warnings appear in the top-level output of my workflow, which is kinda of annoying since they will never go away. Here's my config if it helps:

    - name: Set up Python ${{ matrix.python-version }}
      uses: goanpeca/setup-miniconda@v1
      with:
        auto-update-conda: true
        miniconda-version: "latest"
        python-version: ${{ matrix.python-version }}
        channel-priority: strict
        channels: conda-forge/label/testing,conda-forge
        show-channel-urls: true
        use-only-tar-bz2: true