If you click the 'remove' button on all rows in the artist credit editor, and then click 'Done', it will make the whole field be removed, with no way to edit it again.

See attached gif for details.

Tested in the 'add release' editor, in the release artist field, and track artist field. Chrome browser with all scripts disabled.

This is solved by just not allowing the removal of the last row, which is not useful anyway. Pressing Remove will just empty it.