Marc,

Were you able to determine the exact cause of the disconnect with respect to LG's turn-on issues?

I have witnessed this very issue with my own LG 55" OLED as well with customer owned units. It kinda-sorta seems like a timing issue to my old and tired eyes...
the required handshake info is possibly not getting through or being parsed quickly enough?

I rearranged the turn-on sequence so that the DirecTV was first in the macro string, Denon AVR next, Input Select next and LG power next to last with the LG Input select the very last command being issuesd from the Harmony rmeote.