Also having this issue. I'm not sure when my Samsung UE55MU6400UXXU did a firmware upgrade to T-KTMDEUC-1210.8, BT - S, but it must have been in a the last few days, as now my TV is constantly changing source (automatically) to "TV Plus". For example, the tv keeps switching to TV Plus when watching Sky (sky box connected via hdmi 1). This happens over and over again and has essentially rendered the TV useless. I have had this tv since Jan 2018 and it has worked with no issues since then, but all of a sudden this annoying TV Plus app keeps opening by itself - it is extremely frustrating, especially after how much money I spent on the TV.
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