I am so disappointed and annoyed. I have paid 1600 pounds for this tv (xd 9305) and it is clearly a model with bugs despite its incredible 4k picture. For the third time in 10 days the tv has lost all sound when I switch back to hdmi input from you tube app. Only a full factory reset seems to solve the problem but as other owners will know this is a real hassle. I would rather the tv had no android and apps but worked smoothly if this is the price I have to pay. Has anyone else experienced this bug?  Is Sony doing anything to fix this potentially fabulous tv? I expect a tv to work smoothly and with no issues ; and to have been thoroughly tested and debugged before going on sale to the public. So disappointed ...