I made a component which is nothing more than a notch cut into a piece. Basically, I made a rectangle and the push tool to do the normal thing. It is situated to the top of the notch is flush with the top of the piece it has been put into. Looks great. I made a component out of this. Then I used the component, and the top of the notch seemed to be a minute amount below the top surface - there’s a skin there now. I cannot select it.
Here’s an image of the used component on the left, and another on the right, made by hand, just like the original notch.
Components can only cut one face, you appear to be trying to cut two faces.
The cutting plane of the component is on the large face, so the small face will retain it’s own face plus the face it is against, causing z-fighting.
Using two components, one for the notch and a simple hole for the other face you can get to this, but the edge in the corner won’t get hidden. Cutting components only cut faces.
Well it depends what it is you are wanting to achieve. Perhaps we can offer other options you haven’t thought of.
You can do a pretty quick array with raw geometry.