Chennai H4 dropbox 221g issued - October 2020

Hi all

My wife submitted H4 docs at Chennai VFS drop box on Sep 24, 2020 but the passport was returned in 5 days with 221g white slip asking to submit “proof of principal applicant’s legal status in US”.

That document is obviously my H1 copy which we submitted on Sep 24 itself. As it was asked again, my wife submitted the passport and the H1 copy and all other imp docs again on Oct 5.

We are still awaiting for the passport and recently the status in has changed to " Document delivery Information:" and it doesnt show any delivery information.

We have a confirmed AI ticket on Oct 23. Should I postpone/cancel ?

What does it mean? Any one faced this kind of situation?

Thanks in advance,