Command Bar Bug - TV activation

Hey guys,

i am struggling with a bug on my command bar: When the command bar is in standby and i acitivate it by saying "alexa, play my chillout playlist", the music starts - but also the TV. Few seconds later the music stops and the command bar plays the TV-sound (plugged in via ARC-HDMI).

Any suggestions? Reset didnt help. also tried new hdmi-cable and different power-plugs.

I am really hoping for some help, Philip.