Distance Field Draw Distance.. ? What are the limitations?

I’m quite new to unreal, nonetheless - working on the project I found and there is an issue.

I need to make a material and using Distance fields mask parts of the terrain that overlaps the structure I place on it.

By itself the effect works, I get a nice, textureless void around my thing, but I encounter a problem I cannot solve for the life of me:

As I move further away the Distance Field distorts and morphs, messing up the effect, eventually it stops working completely

It’s all fine for up to 10k… units? (checked with distance from camera to actor) After so parts of the effect are canceled and I see terrain again, after ~20k the effect does not work at all.
One other thing is that on the very brink, where the bugs start and I still can see it properly working(sort of), If I’d rotate the camera around it starts to bug too.

I have looked far and wide for possible errors from my side, different settings and all, yet nothing seems to help. Nothing unintended is affecting the lighting, the light is movable, draw distances are sky-high, resolution is also maxed.

Is there some hard limitation on Distance Fields currently, that I possibly missed?

I could post some screenshots if it would be helpful.

Thanks in advance!