Black textures on Deferred Technical Preview

Steps to reproduce:

Launch the game (Minecraft Beta 1.20.40.20)
Create a new world
Enable "Render Dragon Features for Creators"
Apply one of any resource packs that contains PBR
Enter the world
Enter Settings while you are in the world
Select "Deferred Technical Preview" in the Video tab
Exit Settings and click "Resume Game"
You will see black textures in the world
Device used: A22 5G (Mali-G57 MC2, Mediatek Dimensity 700)

Affected: 1.21.30.21 Preview/Beta