I had no issues when using MK808B+ with my Samsung TV, perhaps you can try using a different cable or different mini HDMI adapter?
For me TV shows "disconnecting from AnyNET+" quite often. Usually it happens when I push navigation buttons on RC with high rate. I tried many cables. Should reboot OpenELEC and select Kodi in TV Tools to make it work again. I'll try to upgrade TV firmware (not sure that it is available, it is quite old model). Does it make sense to enable and grab CEC component log? Thanks anyway