“Add Actor World Offset” Only Work when Delta Vector-Z >45？？？

[No.0ne]

I used the ThirdPerson blueprint, and I want to add actor continuous Up Offset (ignore gravity) .

But, I found “Add Actor World Offset” in Z direction ONLY work when the delta location-Z>45. And other direction is okay. Why so strange? Any hidden parameters need to set in char movement?
Thank you for answer me. I’d really appreciate it!

1. This is my blueprint, and the green node is “set gravity scale” .
   

   

2. when Z axis <45, character does not work. Only stay here.

3. when Z axis >45 , is 46, it does work. Character can offset in Z direction.

[No.0ne]

picture 2 is:

[No.0ne]

picture 3 is:

[No.0ne]

Thank all, I solved by myself. To Decrease “Max Step Height” in “Character Movement :walking” ,then is okay!!!