Spawn actor collision not work in multiplayer

Hello. I don’t known if its a bug or i missed something.

I spawn actor with static mesh (1m_cube) in front, runtime and blank project for test, while in single player mode works ok if i check dedicated server my character when jump on top crosses the cube or i can walk across.

i write the question in AH too.

I check today with 4.11p2 and same problem. any idea how to solve this or if is bug?