It did this in my old truck and the new truck using my extra docking sled that was never mounted in any vehicle before this one, so I'm 90% sure it's the tuner itself. It doesn't seem that reception is the problem because you can barely hear it at max volume and it sounds like the signal is fine, and the signal strength meter would fluctuate like normal between 4 and 5 on the strongest station here.
I'll contact support. Thanks!!!