Default project - blueprint rolling doesn't work for 2 players

I launched it for 2 players, clien’t can’t move and server flickers - can see both client’s and server’s view. Help :frowning:

It seems to be similar to this issue:

When I “reconnected” the client, I could move both server and client, but they were out of sync, the clien’t didn’t see server’s movements, and after the collision the client’s possition changed instantly and he couldn’t move anymore.

This is my blueprint

I display on the server the number of balls that are there, somehow the code runs twice(??)
First it writes that there are 2 balls, and then that there is 1 ball, how is this happening? Maybe this is what causes all the flickering. Shouldn’t it be called only once? It’s only on event begin play, and only on the server, I see no reason why it’d be called twice :frowning:

#edit
seems that nothing works for me, I even downloaded the project from

and started the game for 4 clients, the view still flickers between server and all 3 clients, I’m not doing anything so I can’t be doing anything wrong, I’m using UE 4.4.3