Shader graph shader produces strange error in Unity 2021.1.16f1

This error states something about a variable Vector1_xxxxxxxxxxxxxxxxxxxxxx where xxx are random numbers and sometimes compiles and shows no error, other times does not.

I am trying to run a github that uses URP shader graph and while runs fine in 2021.1.15, or 2021.2.0a17, fails in 2021.1.16. The system uses entitites and their renderer also and fails to show anything when those are activated ( the shader appears before that is used).

Any insight on similar issue or same would be appreciated