add-mask doesn't work with workflow_dispatch inputs

Describe the bug
Github actions workflow with inputs cannot be masked using add-mask.

To Reproduce

1. Create workflow

name: add-mask-test
on: 
  workflow_dispatch:
    inputs:
      secret:
        description: 'secret value'
        required: true
jobs:
  my-job:
    runs-on: ubuntu-latest
    steps:
      - name: add-mask test
        run: |
          echo "::add-mask::${{ github.event.inputs.secret }}"

2. Run workflow entering secret value "password" as input
3. Look at workflow log and see value "password" appears twice without masking

Expected behavior
The value in add-mask does not appear at all in the workflow log output

Runner Version and Platform

Current runner version: '2.272.0'
Operating System
Ubuntu
18.04.4
LTS

What's not working?

The value in add-mask appears twice without masking

Job Log Output

add-mask test
shell: /bin/bash -e {0}
Run echo "::add-mask::password"
echo "::add-mask::password"
shell: /bin/bash -e {0}

Start with the provided workflow_dispatch reproduction on Ubuntu and inspect how the runner processes the ::add-mask:: command and workflow inputs. Compare the two log entries shown in the report; done means the entered input is not exposed in either workflow log output.