Post Processing Volume Material is blocking my transparent Materials

if I assign a post processing material on my post processing volume, then my transparent materials just disappear.
Hope you can help,

Can you provide some screenshots from the level and your PP material please?

My Post Processing Material:

My Level With Post Proßessing Material:

My Level Without Post Processing Material:

Have you tried using PostProcessInput0 instead of SceneColor?

Now ist working,
thanks for your fast answers!!