Hi!

I have same problem which has been alive before and after update of Marshmallow. It's only about remote controller, batteries are new and so on. I tried many possibilities from forums of sony. Nothing helps the randomly appearing problem of remote controller not responding anyhow. TV led doesn't react. Problem is like 10-30sec long, and it appears very randomly. 

Remote controller problem

This is annoying to just wait and wait.

EDIT: I'm using TV's own remote controller RMT-TX100D