My guess is that something needs to have its firmware updated -- probably either the TV or the player, but it might be the AVR or the matrix switches
Check them all.
An unlikely possibility, but one that's easy to check, is that CEC is enabled in the TV and player and their control codes are confusing things. I believe Samsung's name for it is "Anynet +". Try disabling CEC in all of your devices.

An unlikely possibility, but one that's easy to check, is that CEC is enabled in the TV and player and their control codes are confusing things. I believe Samsung's name for it is "Anynet +". Try disabling CEC in all of your devices.