Syns you are not the only one having this problem with freezing or buffering.
I have the same problem for almost a week. Sometimes works fine for few hours and the buffering doesnt stop or video freezes but the audio still working. Now looks like some channels are not even working.
Im using Minix Win10, Kodi 16.1, Staker Client 1.0.8
Hopefully someone is working on these issues.