Any idea what is causing this?

Screen turns on, then goes black, then comes back on again after fresh boot, takes an extra 30 seconds or so for it to finish each boot:
https://streamable.com/na6k5y (skip to 0:25 to see where it happens)

Also, if my monitor is not turned on before pressing the power button I just get black screen with no display whatsoever and have to hard reset.

My hardware: i7-7700K, iGPU HD630
SMBIOS: iMac19,1

Using Whatevergreen.kext and Lilu.kext

My config.plist file: https://pastebin.com/2v52bhyS

submitted by /u/avidrunner84
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