Custom Fields - Escape : in value

[TheDiggster13]

I'm attempting to use custom fields to pass an image url through to my release. The URL is in the format:
123456789.dkr.ecr.us-east-1.amazonaws.com/service:IMAGETAG

My Github action invoke looks like:

- name: Create Octopus release 🐙
      uses: OctopusDeploy/create-release-action@v4
      with:
        channel: ${{ steps.config.outputs.channel }}
        git_ref: ${{ (github.ref_type == 'tag' && github.event.repository.default_branch) || (github.head_ref || github.ref) }}
        git_commit: ${{ github.event.pull_request.head.sha || github.sha }}
        project: ${{ inputs.project }}
        release_number: ${{ steps.config.outputs.package_version }}
        release_notes: ${{ (inputs.release_notes != '' && inputs.release_notes) || (github.event.pull_request.head.sha || github.sha) }}
        package_version: ${{ steps.config.outputs.package_version }}
        space: ${{ inputs.space }}
        custom_fields: |
          IMAGE_URL:"${{ inputs.image_manifest_tag }}"
          BUILD_NUMBER:${{ github.run_number }}

When I look at my release in Octopus I can see the IMAGE_URL custom field exists, but the IMAGETAG part of this is cutoff.

Is there a way of escaping the : in the value of the field? I have tried wrapping the value in "" which hasn't worked.

[TheDiggster13]

I've done some digging and I think I have identified the source of the problem, and a possible solution:

input-parameters - This seems to be where the parsing of the multi-line input is happening, and has the problem that the value destructured value discards any additional :.

This can be fixed by changing line 38 to:

const [rawKey, ...rest] = field.split(':')
const key = rawKey.trim()
const value = rest.join(':').trim()