Latitude 5300 - Screen with no brightness until sleep -> wake

I have a Latitude 5300, everything works fine, except for this weird bug.

Immediately after booting, the backlight of the lcd is turned off until a random amount of time passes (like 5-10min) or I do a sleep/wake cycle. The screen works, i can see what's going on if i hold a lamp or something, but I have no brightness control on macOS. I tried with another screen (1366x768) and the backlight was on minimum, but the same.

I have tried with SSDT-PNLF-CFL precompiled, SSDT-PNLF compiled by myself (SSDT-PNLF is deprecated by the way), updating my kexts, compiling my own dsdts, and no solution yet.

I have experience doing hackintoshes, so I searched but I couldn't find anything.

Latitude 5300 - i7-8665U - Intel UHD Graphics 620.