Steps to reproduce:

1) Open Unity Hub and create a new UniversalRP template project
2) Create a sphere in the scene
3) Create a material and apply this material to the sphere
4) Set the metallic and smoothness on the material to 1
Observe: Material is metallic and smooth (reflects all the environment)
5) Press Ctrl+S(to save the scene)
Observe: Smoothness and metallic disappear

Reproduced with:
Universal RP package:
7.0.1, 7.1.1

Not reproduced with:
6.9.0

Unity:
2019.3.0a12, 2019.3.0b1