Something wrong in layers cut out shape

Hello. I have a strange thing in my illustrator. This is version 27.7.

I'm doing a project for a client and a simple thing doesn't work well.

The blue layer is the layer for the spot color with the overprint. Below this layer is yellow text.
When I cut a text layer from a blue layer, the cut is uneven.
As you can see in the photo, the blue color is visible at the top of the letters.

When I move one point up a little bit, then the whole letter is visible, but that point is still too high.