Why these green pixels appear on material when Blend_Overlay is used?

Hi, I’m rather new to materials and textures features in UE. I found out that Blend_Overlay gives pretty neat result very yeasily, but I have a one problem - when I blend 2 textures using this function, there are plenty of green pixels


that appear and disappear depending on camera angle. Is there any way to fix that and still be able to using Blend_Overlay?
I’ve been looking through the internet for a pas hour (at least) and could not really find anything.
P.S. I can’t post anything using 5.0 version tag, so I’m using the closest one :frowning:
Result video:
![Unreal Editor 2022-03-06 23-21-53|video]

Material BP screen:
(upload://lDKpwfr0y1i0nb7dRtMKUcP13Bf.mp4)