I feel your pain. My LG constantly unpairs from my phone app, so I had to use the remote to turn it on all the time. My solution, which works half the time, is to send a wake on LAN command from Vera. I setup a scene for the execution and now use Alexa to turn on the TV.
This isn't perfect, but at least gets the TV on 50% of the time which then my phone app pairs again. The LG app sucks for turning the TV on, regardless if I have the permissions enabled on the TV.
I did this setup because my LG is in my bedroom. The remote is usually laying on the dresser when I'm in bed and don't want to get up and get it.