So when my taskbar is hidden in windows big picture will boot with a 1-2 too low(or high) depending on where your taskbar is.

As in you'll see a sliver of your desktop rather than BPM taking up the entire screen.

https://imgur.com/a/2Vp3y4R

My task bar is on the top, so thats where you'll see parts of my desktop. The only solution thus far of not hiding the taskbar is a non-starter for me on OLED.