If you mean by jitter your character rotates up and down. Then yes. (You can also use line trace but make sure you offset it down far enough. Also line trace is not enough cuz you will collide with slope before you even line trace it. You can also Get Socket Location to get the root bone location.)
With this code I haven’t noticed the character legs going through the ground. (I was running it on tick. If I run it from event then the legs do go through.
I also had an issue with the camera and it was flicking/jittering fast when rotating. Fixed this by making camera manager and then making it follow the character.)