B50 HDMI arc issue

After about 1-3 days the Power On command via CEC control from a LG OLED55B6P-U stops working. the power of command always works (once the B50 is ON.
All settings in the B50 and TV are correct and normally work.
Its not the TV since I can unplug and re-boot the TV and still no power ON for the B50. If I cycle either main power or just turn the B50 On/Off from the remote, it starts recognizing the power On command again (at least for a day or two).
I have the latest firmware installed as well.
I was on 0052 but the upgrade to 0057 had no effect on this issue.