So I am going to supply a link to YouTube with the error. But what is going on is that when I play the game in a new window, when I play as the client window, it jitters when I move to the left and right but not going straight or backwards. However, when I play as the server window it is fine. Any ideas?
YouTube Link:
http://youtu.be/XLD5wdhMfyI
Ever find a solution?
No never figured it out.
After some more research I fixed it
I unchecked “Orient Rotation to Movement”
This fixed it for me. Hope it helps!
Thanks a lot Vanlacke! This solution worked right out of the box for me! Much appreciated!
If anyone else has similar problems feel free to ask. We’re running a networked multiplayer third person game.
THANK YOU SOOO MUCH <3
Actually unchecking “Orient Rotation to Movement” works great as long as you don’t care about orientating your character’s rotation to its movement. In case you do, leave that box checked, go into the character blueprint, go under Class Defaults and uncheck “Use Controller Rotation Yaw”.
You see, what’s going on when the character shakes is that you are telling the character both to move according to the controller rotation yaw and the character’s movement rotation, so when trying to move in any direction but forward (the direction in which both rotations are equal) you get this weird jittery look between both movements.
Finally! This post gave me the hint that solved my problem that I struggled with for days.
I had rotation jitter when I turned this flag on due to I did not have strafe support for mounts at that point.
It was only noticeable in client pure server shipment when I rotated in place.
Thanks!
After all this time, this works! 
I think this option is useful for third person.
This is good solution and movement settings are confusing - you have to check it in different locations - movement and character class defaults, that can make a mess. Thx’s @pablodelucca
Wooaahh I’ve been looking for the answer of this problem almost a whole month! Thank you very you’ve save me from my stress!
Character had a case of the jitters! Thank you so much! Nice job! Upvoting
thanks , u save my day