POM warping artifact when viewed from an angle

Hello there. I’ve came across a weird problem with parallax occlusion mapping. There is an artifact that doesn’t appear on any other of my models, but it doesn’t really seems like a mesh related question after all. Then viewed from a high angle a warping effect distorts about half of this door’s material.

The number of min/max samples doesn’t matter but rather lowering Reference Plane’s value seems to partially affect strength of warping (still remains on 0). My nodes setup looks rather basic, but here it is:

Do you have any idea about what could be the cause and how could I make it disappear?
Thanks.

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