I agree with Abhilasha_pokhara. For me the officer asked general travel questions and told I have to go inside the other room. At first got little bit surprised, so asked if all my documents are okay, and I told my AP expiring date has 6 more month. Then explained me that since AP means advance parole, they have to assign our entry I94 status as parole and they dont carry that stamp outside so you need to wait inside. Inside there were few people, about 4-5 waiting, many looked very serious. Waited for my name to call, around 15mins and same thing general questions, like how long u were there, what kind of work u do, and left. As long as your TPS and AP is valid you are good. Lets not call it secondary inspection its normal process. This was last year, few of my friends went this year for dashain and came back. good luck