Given that even BEFORE the mess in Washington, amended returns were taking a while (not necessarily six months - Bob has better intel than I do...) it is unlikely the kid's amended return will be processed any time soon.  The last time I had this happen, the kid's return didn't get processed by Oct 15, xxxx.

You can 'wait & see' but it is highly likely the parent's return will need to be paper filed.

(edit.... I have trained my clients to FORBID their kids from filing until Mom/Dad's return is accepted as this is a royal pain in the a$$ )