Geometry Script - Apply Bend Timeline

Hello there,
Any clue why I have a weird bending when apply through timeline?

I have successfully applied an animated twist here: https://youtu.be/-91xwbTaw74

Here is my target bend of 90° applied at construct:

Here is though a bending of 1° for 3sec with a sin curve (same mesh/settings as the working example from my video):

Not sure what black magic make twist seamless but bending offset :confused:

Here most of my code: