Rotation is lagging (4.3 Beta)

Hi,

I use Grid Graph (2D) and have a problem with the rotation.
The rotation is lagging - like it’s not in Fixed Update - but updated 2 to 3 times per second.
I’m using the latest 4.3 Beta (pro). I didn’t have this problem with the 4.2.15 version.
I try to modify the “rotation” parameter in AIPath, try to disable the “simple smooth modifier” but nothing seems to work.

I added a gif to describe more accurately

Thank you,

Vincent

The destination is set thru script