I actually found the cause and a simple fix for the sprint stuttering. This fixes almost 99% of the problems with sprinting in multiplayer for me.
In the UpdateMovement_PreCMC calculations just add hard coded values for the sprinting state (”CalculateMaxAcceleration” and ”CalculateGroundFriction”). I can’t see any differences when playing so that solves the problem for me.
I made a video showing the problem and how to fix it:
