Hi, I'm currently using Mi Box S with 30mbps Unifi Fiber connection. I have no issues streaming Netflix and some Chinese apps. But when I tried streaming with Kodi and Cinema, I'm having buffering issues. When I tried streaming the same app on my phone there is no buffering issues which probably means my connection is sufficient. Is there any configuration which I can do on my Mi Box S to resolve this issue ?

Yes, even after restart its the same. And if I use indigo for speed test the result only 2mbps