Issues with regard to unlinking inline references in rich text fields:
- Ability to unlink an inline reference, so it becomes plain text (unlink menu item in the reference).
- Inline references to automatically become plain text when the referenced entity is deleted or inaccessible (because of user permissions)
See also
- Replace Inline Reference of Deleted Entities with Plain Text (about converting back to plain text)
- References reloaded (all reference issues need to be mentioned there)