We use a Mi Box S with StbEmu and/or TiviMate, depending on who is using it.
Many channels have artifacts and stutter or reload and jump back in time a few seconds.
I got so fed up and tired of those issues that i set up an old Windows PC with Kodi and the Stalker Client Addon. There the streams work perfectly fine and even look a bit sharper.
So it's not an issue because of my provider.
I already tried resetting the Mi Box, but it didn't help.
Any clues? We prefer using the Mi Box because of the apps and the remote.
Personally I use the NVIDIA shield. But I own a Mi Box S for making AndroidTV videos.
Get a shield.