It still happens with A7.66 cry

If it's any help (for you to understand), i'm moving the entity over a huge smooth textured surface, about 400 x 2500 quants.

I've noticed that the entity stalls at low moving speed (i'm moving the entity with phent_addtorqueglobal) and exactly over some (not all) gridlines, visible when debugging with F11.
Could the block size be a problem ?

I'm using the same moving method as seen in workshop 19, except the runtime entity creation. My entity already exists on the level and have his action attached.

That's the only fail that the whole game has and i've tried many things, without success though... help is greatly apretiated, and thanks a lot for your time.