I've had an LG OLED65C9PUA for years and have never had this problem until very recently.
Now every time I try to use the voice command to enter a search sequence, the "SPEAK NOW" activates and shuts off within half a second. It doesn't matter how I activate the voice command function or what app I'm using that has the function built in. Such as YouTube or even the Web Browser or whether I activate the voice search with the onscreen microphone icon or the microphone key on the remote. All voice command attempts shut down within half a second. There isn't even time enough for anything said to be recognized or even "not recognized".
Fresh batteries have no effect on the problem. Turning the TV off and back on has no effect on the problem. Removing and replacing the batteries has no effect on the problem. Reregistering the remote to the TV via the extended holding of the GUIDE button has no effect.
How do I restore the voice command function for the remote?