I just got my Arc and using it with my TCL 6 series and Shield Pro over eARC. I love the Dolby TrueHD with Atmos but I notice that after a while I lose the TrueHD on compatible media and get the DD+ Atmos instead. I can fix this by unplugging the Arc’s AC cord or HDMI. Any ideas? I am using the Arc included HDMI cable for itself and 2.1 cables for my Shield and Apple TV 4K.