HDRP and shader graph shaders: material inspector looks broken

writing a custom shader using shader graph the material inspector seems to be broken:
texture previews are squeezed and labels are cropped?
using unity 2019.3.0b7 and hdrp 7.1.2.

5092124--501689--hdrp editor.PNG

Texture previews are deformed here too in 2019.3.0b7. Better probably report it as a bug.