H1B stamping in Singapore on a business trip

I may have to travel to Singapore for a business purpose from US. Below is the case of my current Visa and Please let me know your advice.1. I have approved I797 until April-2021.2. My visa stamping in my passport is expiring by April-2018 (in next 4 months).will there be any issues if I do stamping in Singapore US consulate before I come back to US or is it safe to go to India for stamping and return from there?I read some bad experiences at Singapore US Consulate.

Hi DId you attend the interview? How was the experience?