Rendering in the red?!

All,

I know this has been an issue for years.

I am using LUNA on i9 MBP, 64gb ram, 4tb SSD, 5800M Radeon... basically maxed out for when I bought it. I am using it in clamshell mode hooked up to a Samsung Odyssey 49" and a 4k 55" HDTV

I made decision to use LUNA 100% exclusively for my last record (as well as the Townsend microphone). I bought the API console as well as an Ultimate bundle. Overall it was a good experience but man, that rendering issues was a constant buzz kill.

I've read the reduce resolution fix, only use 1 monitor fix, etc.. but that doesn't work for me. I am getting back in to music production for others and want to use LUNA exclusively, but if this error is here to stay, I'll have to go back to ProTools.

Help?

tia, s0nguy