Plans to go for H4 Stamping Interview while COS is in pending with USCIS

[pvac26]

We applied my H-1B Extension and H4 (I-539 change of status) together in Premium Processing. 

My H-1B Extension got approved but we are still waiting for H4 (I-539 COS).

Let's assume that my wife goes back to India and gets her H4 Visa stamped then,

1. Will it automatically cancel/abandon her I-539 COS?
2. Or do we need to send any Withdrawal kind of letter to USCIS?
3. Can the I-94 which we receive through H4 Visa stamping + when she steps back into USA at Port of Entry be used for filing for EAD renewal?
4. In general will there be any complications or negative impacts from getting H4 visa stamped while I-539 COS is in progress?
5. Will their Systems/Databases go out of sync due to H4 Visa Stamping while I-539 COS is in progress?

Kindly help by answering all the questions or whatever questions you could answer...much appreciated.

Note: I did go through a few of the posts/threads....but somehow it did not completely help my questions that's why I am posting this new post. Kindly help.

[shekar11#]

On 3/1/2020 at 12:20 PM, pvac26 said:

We applied my H-1B Extension and H4 (I-539 change of status) together in Premium Processing. 

My H-1B Extension got approved but we are still waiting for H4 (I-539 COS).

Let's assume that my wife goes back to India and gets her H4 Visa stamped then,

1. Will it automatically cancel/abandon her I-539 COS?
2. Or do we need to send any Withdrawal kind of letter to USCIS?
3. Can the I-94 which we receive through H4 Visa stamping + when she steps back into USA at Port of Entry be used for filing for EAD renewal?
4. In general will there be any complications or negative impacts from getting H4 visa stamped while I-539 COS is in progress?
5. Will their Systems/Databases go out of sync due to H4 Visa Stamping while I-539 COS is in progress?

Kindly help by answering all the questions or whatever questions you could answer...much appreciated.

Note: I did go through a few of the posts/threads....but somehow it did not completely help my questions that's why I am posting this new post. Kindly help.

1. Yes.

2. No.

3. Yes.

4. No impacts.

5. Nope.

[pvac26]

On 3/3/2020 at 1:31 PM, shekar11# said:

1. Yes.

2. No.

3. Yes.

4. No impacts.

5. Nope.

Thank you Shekar for the responses, much appreciated