Parent Field - Add and Edit Problem

[kiranetph]

My Parent field can have several children.
I added the parent through the child field. The parent shows up in intro and full of the child field.
On the parent side, I can see the attached children on intro and full, but when I try to add or edit children, they dont show up on the submission field and I can not search for any additional. even the already connected children dont show up on the submission form. Actually I can not add anything here, but the results are displayed correctly.
For the moment I disabled "edit" and "add" access.

Another question: if a disable Add and edit on the form, can we also hide the field? Or as a feature request: Hide fields on forms