The biggest bug I've come across recently is with the android media player dropping frames, stuttering, and ultimately freezing completely/becoming non-responsive to inputs. This necessitates a hard power reset. I've seen it on all four on my Shields across multiple apps. I did a factory reset on two of the ones that experience it most often, and I am waiting to see if that has lasting effects. Additionally, a few apps, like Prime Video, won't do Dolby Atmos unless you reboot your device, and may still refuse even then. I have confirmed this is the same behavior on my Shield and my Sony X950H. The app hasn't been updated, but I did get Android updates from both Sony and NVIDIA right before this started.