Glitching of shadows in Deffered technical preview(MCPE)

So I was trying the betas as mojang finally announced PBR support for Minecraft Bedrock Edition(I play in the pocket edition, in my mobile).So I tried different shaders that would enable the Deffered technical preview option but none worked properly, the only problem is that the shadows or lights are glitching very much. I tried all the betas like 1.20.30.20, 1.20.30.21 and 1.20.30.22 too but in none of this betas this problem was fixed. Please do something about it. I have added some images and screen recordings below for you to understand