I have issue on a movement replication. When i try to run with left shift my client side become jittery. And when i try the multicast sprint action into another character bp it is working. So i dont know why is mine broken and i cant find the solution and i drop my sprint nodes
You’re forgetting that CMC has built in Client-side movement prediction. Meaning you have to apply the changes locally on the autonomous proxy, then RPC the server to walk the same process.
Input → Apply local logic → RPC Server
Server → Apply logic
Do Not Multicast Anything related to character movement. It’s not needed. Once the server applies it, all simulated proxies will be updated accordingly.