Are you still updating? There have been several bugs reported and the answer has been "fixed in next update". Well, it's been months now and no fix. I'm starting to regret purchasing this item, even though I love it, because it looks like you may abandon it already.
I really hope someone from Xiaomi will see this and give some sort of update.
The Mi Box came out in October. It's been 2 months.
NVIDIA took about 4 months to get Marshmallow. It still doesn't have Nougat (which came out 4 months ago).
You just have to be patient. Every fix needs to go through a testing/approval process because they're not just updating a single app; they're updating the system image. Any new problem they introduce will affect 100% of users.