Glass is material is broken in blender 2.8

Support Materials and Textures
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1

Just doing the donut tutorial and when im adding the glass material to my cup i get this in my render

Broken Glass
Broken Glass1920×1080 280 KB

How can i fix this ?

2

Looks like the normals might be inverted.

3

I inverted and it looks better, but the material is still degrading inside, what could it be?

Broken Glass2
Broken Glass21920×1080 370 KB

4

Hard to tell. If you go to Viewport Overlay and activate facing orientation, does everything show up in blue? Helps if you share the .blend.

5

I already forgot about it, but thanks for your help;)