There is a known bug for now with the Xiaomi stick 4k,
Found on foreign forums...
Latest Google Katniss makes the CPU load constantly run on 100%
You can see that on AIDA64 app, it run on 2004Mhz constantly...
The fix is just remove "installed updates" of "Google" app and "Force Stop"
And disable auto update on Play store...
Google is aware with this bug and will resolve it in next update...
Enjoy.
That seems to be not a Xiaomi 4k Stick only problem? I see that same full CPU loads with the AIDA64 app on a nVidia Shield TV 2019 Pro (with the ATV11 update).
Edit: I've just removed the update and voila, you are right.
So were did you read that this is an issue and that it will be shortly solved by Google?