The texture set is from Polyhaven. I didn't try to turn off RW scale, but yes, the issue gets less visible, or completely disappears if you add subdivision to the surface, or adjust displacement level bias. As far as i can tell, the only thing that can be considered unusual in this set, is that its displacement level midpoint is at 1 and not at 0,5 Not sure if that has something to do with the issue though.