AI animation with some skeletal mesh do not walk fine

Hello ! I got an legs issue in my project. All my character have to exact same ABP (I haven’t custom it yet) and the same skeleton (to share animations). When I animated them with my ABP it’s Ok, all character responding well. But, when I try to use them as IA character (to follow path), some gets doesn’t move correctly.


in ABP_Manny (orginal file) I only change the mesh to try it, and it looks fine too, so I see no explanations here (and the problem is the same, regardless the walking speed I use)

Have you some ideas ?
Thanks !