Unfortunately my original MiBox remote is broken and I use a replacement Xiaomi remote. It worked OK under Marshmallow but turns out it's very buggy under Oreo. Can't reorder apps, can only launch apps from a popup menu and some apps stopped responding. Is there any way to roll back to the original OS?
There is a bug in Accessibility, that causes your exacting issues. Go-to Settings, Accessibility, and make sure all services are "off".