Well, in case anyone is following or happens to stumble upon this thread during an internet search, it turns out that the restarting of the TV is a hit-or-miss solution at best, and even then it doesn't work for long and I have to restart it every few days. Another frustration is when I'm on the smart tv screen where there are buttons to all my apps and so forth, I often cannot navigate between buttons with the Harmony remote and have to use the OEM remote. Often just pressing one navigation button is enough to make the Harmony navigation start working again. So I have to keep the OEM remote handy for occasional use.

So I would say that the Logitech Harmony Elite remote is "somewhat" compatible with this TV, even though Logitech claims it is compatible.