Select the node shown below and change the Rotation input to a variable type Float then copy the images below.

Then go to the location shown below and remove the highlighted nodes.

Next go to the BP_PlayerInventoryComponent and find the Set Character Movement Speed event and change it to Not replicated.

Next create a new custom event called Server Set Move Speed and set it to Run On Server and tick Reliable. Then add input called character state and set the variable to E_CharacterState.

Then copy the videos below.

Go to the BP_MasterCharacter blueprint then select the CharacterMovement component then in the details tab search for Network Smoothing Mode and set it to Exponential.