action is skipped, why?

[cenit]

as per title, can anyone please help me understand why action is skipped here?
I have never seen it working correctly on this repo

https://github.com/AlexeyAB/darknet/actions/runs/956515006

link to comment that triggered the skipped run: AlexeyAB/darknet#792 (comment)

this is the yml in the repository. Note that I am not interested in CI automatically triggering afterwards, just rebasing to work

name: Automatic Rebase
on:
  issue_comment:
    types: [created]
jobs:
  rebase:
    name: Rebase
    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/rebase') && (github.event.comment.author_association == 'MEMBER' || github.event.comment.author_association == 'OWNER' || github.event.comment.author_association == 'CONTRIBUTOR')
    runs-on: ubuntu-latest
    steps:
      - name: Checkout the latest code
        uses: actions/checkout@v2
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          fetch-depth: 0 # otherwise, you will fail to push refs to dest repo
      - name: Automatic Rebase
        uses: cirrus-actions/rebase@1.5
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

[vikram-katkar]

Probably, workflow flie must be on default branch already unlike other trigger event.
https://docs.github.com/en/actions/learn-github-actions/events-that-trigger-workflows#issue_comment

[cenit]

the event appears in Actions, it's not "not run". It just writes "Status: skipped", as if the condition

    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/rebase') && (github.event.comment.author_association == 'MEMBER' || github.event.comment.author_association == 'OWNER' || github.event.comment.author_association == 'CONTRIBUTOR')

is always false, which is impossible to me... if I write /rebase in a PR comment, and I am member, owner or contributor it should run the action, not skip it....