H4 and H4EAD in case of H1B appeal approval

[CG_NJ]

Hi

My husbands employer filed his h1b in aptil 2017 which was picled in lottery but after a rfe it was rejected in dec 2017. However the employer appealed against the decision and USCIS overturned it and approved it in mid feb 2018. The reciept number for h1 application in april and appeal later were different but petition number was same.

We have apptoved I140 and H4 application was filed with H1 and H4EAD was filed separatelyin sept 2017. 

The online status of my H4 and H4EAD still shows in progress. My husband's employer said it will automatically get linked to the apptoved petition since the petition number is the same. Is that correct? Or do i need to file a new H4 EAD?

Also does the processing time of H4 EAD of 90 to 120 days start from.the day of h1 approval?

[NotAnAttorney]

Could you please help with details on the reason for rejection and later how it got approved after filing MTR?

This will be helpful for many in same scenario.