Is it actually mixing it up to 5.1 or just converting to DD+? Either way it ruins the ability to convert I suppose. At least they are acknowledging it and planning a fix.Here is the answer from TCL. I still say bs but I did get an answer back. See attached. I think Roku or TCL screwed up somewhere. When playing 2.0 source receivers shouldn't show DD+. Roku just up mixed everything to DD+ including stereo and that's wrong because us guys with older receivers still like to use the Dolby Prologic II option to up mix 2.0 stereo to 5.1.