I've got 2 NVIDIA Shield 4k's at home for the lounge room and bedroom TV. In general, these both work amazingly. No issues with either... except when it comes to the TVNZ+ app.

On occasion, the TVNZ+ app will launch, work for a short amount of time, but then the streaming slows to an incredible stutter, the app goes completely unresponsive and eventually it'll just crash the device. This happens on both Shields without fail. I can't seem to find a rhyme or reason as to how long it takes to crash (sometimes it'll be 2 minutes, sometimes 20), but the end result is always having to reboot the Shield, or forcefully quit the TVNZ+ app (if I can get the device to respond enough to do so).

No other issues with any other app, I run everything on these - Netflix, Hulu, 10play, Plex etc and they all run just fine. It's also worth noting that the TVNZ+ app runs fine on my phone, casting to the Shields, just can't use the app on the TV itself.

Any ideas? Suggestions?