ScreenToWorldPoint is producing inconsistent Vector3 at high X-coordinate values?

I have a method for producing projectiles in my project that uses Unity's "ScreenToWorldPoint."

This works very well when close to the (0,0,0) in world coordinates - But as I stray further from the origin only on the X-Axis, my projectiles begin to spread? Using debug techniques it seemed the Vector produced became more and more jittery and inconsistent as I move away?

On the Y-Axis I can travel to coordinates such as (0,5000,0) and the Vector3 is accurate and consistent.

I am using Cinemachine within this project, and have attempted the following solutions:

1. Switching the Render Mode for the Canvas (Since I was casting through a custom cursor)

2. Casting through the Cursor instead of my custom

3. Camera in FixedUpdate, Update, and LateUpdate for following

None of these seem to do the trick. Is it that Unity's method becomes inconsistent with high X and Y values? (2000 on the X Axis for Example). Here is the function that produces the projectiles:

Planning on cleaning up some of the ugly so please forgive!