Black screen on wake

[uzurka]

Hi!
I installed MacOS Monterey, using Opencore and Dortania's guide.
Everything works fine except that : When i close the lid, or suspend activity, or whatever turns of the screen, i can't get display back on wake up (open the lid or press mouse / keyboard), backlight turns on, but no display.
Audio is working, MacOS is responding (unlock with password or Apple Watch works), just, backlight turns on but no display.
Just noticed that (closing and reopening the lid multiple times make the display works back SOMETIMES (like 1 out of 20 tries)

• Lenovo Thinkpad T550, i5 5200U, Intel HD Graphics 5500,
• SSDTs builts with SSDTime,
• EFI made following Dortania's guide, no pre-made EFI,
• Tried https://github.com/5T33Z0/Lenovo-T530-Hackintosh-OpenCore/issues/48 => Not better,
• Tried igfxonln=1 => Not better,

My EFI Folder is gitted : https://git.uzurka.fr/Uzurka/Opencore-Lenovo-Thinkpad-T550/src/branch/DEBUG/EFI/OC
Actually using DEBUG Opencore & kexts

Any thoughts ?

Thanks !
Uzurka.