Projectile skill Jitter

When using projectiles, if you use bulletTYPE=MythicItem or bulletTYPE=Item, it will jitter on the projectile skill. Usually I notice that only the y axis is effected. I tried changing syo and tyo values too.

Here is a video https://youtu.be/aAN4GrRHAqY

This example uses the cone targetter so it jitters more but on normal and simple projectile skills they jitter and again usually just the y axis. Here is another example of it happening to a normal item https://www.youtube.com/watch?v=ywofSChDPSk&feature=youtu.be

This is reproducable with minimal plugins and on the latest builds using 1.16.4 MC. When using a onTick effect the effect itself is smooth but the item does jitter around and making an unreliable hitbox.