Question about US Nexus interview

I am a Canadian PR who was conditionally approved today and I am doing the Canadian interview next week. I wanted to get this done fast, but I’ve read that a few weeks ago people have been unable to do the US interview due to the government shutdown. I haven’t found any updated information and appreciate anything you know.

I am mostly asking this because I’d purchase cheap plane tickets just to go across the border and complete this important step. Also, has anyone ever booked tickets, done the interview and then cancelled their trip? I’d honestly be interested in not flying back and forth for nothing, I’d rather just to go home.