HDMI Display wallpaper resets after reboot

First of all i do see a lot of past posts regarding this, but nothing has really helped.
As title says, the wallpaper on my external HDMI display resets on reboot. The laptop display’s wallpaper does persist properly.
I’m using optimus manager and booting in hybrid mode.
Something I noticed was that the wallpaper on the external display does persist on reboot when I use dGPU mode.
Any help is appreciated!