@LZL I've posted a reply on your other thread with the same question:
https://esotericsoftware.com/forum/d/28895-help-me-look-at-the-outline-problem-/2
Let's please continue the discussion over there.

Also note that you can post in your native language as the forum provides a translate-button to translate postings for you. You don't have to double-post in different languages.