I have a Sony KD55X8500D Android TV running 5.1.1. Recently I've been having more and more issues with it. Tonnes of lag in the UI, random reboots, won't wake from sleep, issues with changing picture modes between inputs. You name it.
Is this normal? Is Android TV simply this buggy? Does it get better with Marshmallow (if that update ever comes)? Is there any way to remove all the Sony bloatware?
Do a factory data reset, and make sure you sign into your Google acct, all the apps need updated on the TV as well, only way to do that is through Google play Store on your TV.