How long can I wait to go for PP stamping?

Jet Plex

Registered Users (C)
I got my approval yesterday. How long can I possibly wait to get the stamping. If I go to India, would it be a problem while returning back. I have a valid H1 which is good for another one year. Does the H1 status automatically be invalid, once your 485 is approved or Does it only after the stamping?

I appreciate any help regarding this.
 
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