I had got Xiaomi Mi4i phone few weeks back and I did not like the default launcher at all. As I was shifting from Nexus 4, I thought of using Google now luancher which I am used to. But it faced man issues which are seen in the video. Issues ranging from ones on the home screen, to widgets, to app drawer etc.
Few days after taking this video Mi4i got an update to MIUI 220.127.116.11 but still the issue persists.
You can watch video of the issue/ bug below: