Traveling to India when EAD extension is in progress?

[TwentyTen]

Hello! 

Scenario: 

- My wife`s H4 EAD is valid till Jan 2019

- we filed for an "H4 Extension + EAD Extension" in August 2018

- Decision is pending 

 

Question: 

1. If we traveled to India and return with a new H4 stamp on her Passport, will that invalidate the Paper application that we filed here? Is her EAD still valid till Jan 2019? 

2. Is H4 Extension filed from within the US, the exact same as asking for an H4 at the consulate? Is there any precedence? 

3. Are there any recommended approaches to handling this situation? Are there any risks to traveling in the first place? 

Thanks a lot for reading and taking a stab at answering.