Since the latest (July) update, my Mi Box suffers from general bugs like lags, freezes, restarts or drops random errors.
I have tor restart it every 3-4 days and it's really annoying, cause even these restarts taking too much time (long long minutes).
Any ideas what could I do to make it better? I only use it on 1080/60kHz.
Make sure you update to the latest Oreo, then do a factory reset. Starting from scratch might fix it. That's what I did and mine is working awesome with the latest update, nearly flawless.