Azure DevOps task fails to checkout disabling shallow

In my Azure DevOps pipeline I'm using GitVersion to determine a version number for my software system using semantic versioning. At this time, the GitVersion task fails because my repo is shallow. To overcome this problem, I can add a fetchDepth of 0 to disable shallow clones, however... It fails:

Below is a fraction of my (Yuck Yaml) pipeline:

- checkout: self
  fetchDepth: 0
  fetchTags: true
  persistCredentials: true
  clean: false
  displayName: Checkout and clean

- script: git -C $(Pipeline.Workspace)/s rev-parse --is-shallow-repository
  displayName: Check

As you can see, I do a repo with fetchDepth of 0 but still, the following script (git -C...) reports the repo is shallow:

How can I fetch from my repo with truely disabling shallow repository so GitVersion can do its job?

I could reproduce the issue if I set checkout with fetchDepth: 0, after several runs with fetchDepth set to 1. And I noticed the shallow file kept appearing in the .git directory when the issue was reproduced.

For this, I tried to clean the pipeline workspace to make sure the .git folder in the source directory was removed before the checkout step.

workspace:
  clean: all

steps:
# - script: sleep 30s
- checkout: self
  fetchDepth: 0
  fetchTags: true
  persistCredentials: true
  clean: false
  displayName: Checkout and clean
- script: |
    echo "================1. Check if shallow fetch================"
    git -C $(Pipeline.Workspace)/s rev-parse --is-shallow-repository
    echo "================2. Check YAML definition================"
    cat YAML/CheckoutShallow.yml
    echo "================3. Check shallow file in .git================"
    tree .git
  displayName: Check

Or if you prefer, you may consider removing the shallow file with a simple script.

- script: |
    if test -f "$(Build.SourcesDirectory)/.git/shallow"; then
      echo "Remove shallow file."
      rm "$(Build.SourcesDirectory)/.git/shallow"
    else
      echo "No shallow file found!"
    fi
  displayName: 'Clean shallow'