Here, sometimes when I give a command via ALEXA, the sound on the TV is MUTE, I have to unplug it for the sound to come back, does anyone have this problem? I already factory reset, I did all procedures on LGTHING, ALEXA all commands work on/off, change HDMI, open APP, but sometimes the SOUND IS MUTE.Here, sometimes when I give a command via ALEXA, the sound on the TV is MUTE, I have to unplug it for the sound to come back, does anyone have this problem? I already factory reset, I did all procedures on LGTHING, ALEXA all commands work on/off, change HDMI, open APP, but sometimes the SOUND IS MUTE... bug firmware?