The problem is Google has changed they way SMS is handled now by a default app. Traveler does see the message, but it can't take ownership of the store and keep them from showing.
This is why it's showing up in what ever SMS app you use. I've been submitting feedback to Google about this and that they have Hangouts ignore this push message.
In the meantime, I basically tap and hold on the SMS Hangout and tap the bell icon at the top to turn off notifications so I don't have to clear them all the time along with checking my mail.