Every grey from 30% to 60% comes out dark blue if Epson manages color and dark green if PS manages color.
Macbook pro 2016, Big Sur 11.2.1, PS 22.2.0. RGB color. The paper does not matter. I made a test sheet with strictly grey colors but as RGB document (not greyscale). I've tried many different combinations of available settings (there is not much flexibility). It also happens for every one of my photos that have grey.
If anyone has seen or heard about this problem I will supply more details.