Have you turned off SIMPLINK? (LG's older name for CEC).

Option 1 (Hidden Menu Method)

* Press the Mute button repeatedly until the hidden menu appears; ensure Auto Power Sync is enabled.

* Go to General → Devices → TV Management and disable Quick Start+.

* Go to General → System → Additional Settings → Home Settings and turn off both options.

Option 2 (Settings Menu Method, webOS)

* Press Settings on the remote and open All Settings.

* Navigate to General → Devices.

* Turn SIMPLINK (HDMI-CEC) ON. (webOS 6.0+, enabling SIMPLINK automatically enables external device control).

No, it is enabled. Other CEC commands like changing the active input work.