Just received mine today and it also has a dead blue sub-pixel, but I’ve yet to see it outside of the lcd tech pixel test blue screen as well. Could return it, but everything else is fine. Seems annoying to deal with the process and roll the dice again.
Have you noticed it again yet or any other findings?
I just received a steam deck OLED LE last week and have put a handful of hours into rogue legacy 2. I haven’t run into this yet. It’s on the latest stable build too of course.
I did toggle off vsync in the game settings I believe… Have you messed with any other settings to see if it helps?