REI, if I'm correct, is usually fantastic when it comes to customer service. I'd call them and see what they have to say. I have my TernJoeP24, and it's a completely different size and frame design. I'd ride it to the train station, and use it for my commute, but the handlebar doesn't easily fold (Allen key required). I'm slightly concerned about it though, as Tern hasn't handled the recall of their bikes appropriately. There's never been an issue with my bike model, but the question does remain: do I want to be the first? Your model, even if it was a prior generation of frame, has a history. I, personally, would contact REI.
Sux that this brand I loved so much worries me so much.