popping/banging from rear
My wife's 2018 Envision has a sound coming from the rear of the vehicle that I've just not been able to identify. It is a popping/banging noise coming from the rear, almost like a subtle backfire that only happens at highway speeds - no road bumps or hills...just straight on driving and is pretty random. I've checked the spare tire compartment and visually inspected the underside. During the last oil change, they took a look for anything loose on the underside.
You can hear it from the front driver and passenger side, but if you sit in the back it is more apparent and starting to get annoying.
Anyone else have this?