• Have a master Crud, and add Modal to open a child model crud. (1)
• You open the Child Model Crud in a Modal -there you add entries
• Works fine.
• Then select another master crud's entry (2) where you open the respective child Crud in the modal
• If you then click add, you see the previous, already filled-in form (1's child entry)
• If you close the modal manually, you see an empty (correct) add form - if you enter new entries there, it won't close the modal, but it still saves its content. If you manually close it you see the correct Crud entry.

Seems a logic error on cascaded cruds/modals.
See video here: