[Help] HackBook boots into blackscreen after iGPU recognition, after 2-3min screen starts working, annoying

Hey fellow hackintoshers,
i just recently finished my TriBoot setup Win10/Mojave/Debian ubuntu on my Acer Nitro 5 (full exact specs: https://www.acer.com/ac/cs/CZ/content/model/NH.Q4BEC.001 )
After solving issues with Optane disk and finally installing there were only 3 problems:

1.Brightness control (gonna fix when I have time but could use an advice, not urgent)
2.WiFi (has Intel Card😂, bought super nano dongle, problem is no more)
3.iGPU acceleration (got working, but here´s the catch):

When I boot in verbose mode, the system recognizes the iGPU that I set ID for, then screen shuts off. I thought it´s broken but after a few minutes of panicking, the screen came up and the card was fully functional! It RARELY (like 1 out of 10) goes just into a 1sec glitch and then boots immediately, but otherwise this keeps happening.

Haven´t seen similar problem on this forum, so I decided to write it down here. I´m still super happy with my setup, love it so much, but it is just kinda annoying. Sure there are skilled PRO´s to help.

Thanks a milion!