"standard" rts setup character dancing jitter


i have more or less standard dedicated server rts setup, with point and click controller. The problem i’m facing for quite a long time now is that my character is doing a dancing routine, but only on certain spots on the terrain. It really doesn’t matter if the terrain is steep or horizontal, it’s just random. I’m attaching the video and my navmesh setup. Please help.

I think this has to have somehting with the acceptance radius. I made an huge acceptance radius of 2m
but at some points on terrain it just slides through the acceptance radius and then tries to go back