I noticed that with TiviMate I get a strange sort of “slow motion” effect on a bunch on channels. It’s like the motion is not completeley fluid and I get also micro stutters here and there. I’ve tried few things trying to understand where the issue is: deactivate the AFR, deactivate tunneled playback and try software decoding instead of hardware. Nothing led to a change.Then I tried with IPTV Simple Client and also another Android player (iMPlayer), but unfortunately things remains the same.
With the previuos device, which has Android TV 11, I didn’t have this problem on those channels. I think this could be OS related.
I know, this is not a question relative to CE, but please forgive me. 
I rely on your experience with this device, any tip would be appreciated. Thanks