Material Layer Instances not carrying over parameters

New to messing around with material layers. I’m having an issue where whatever values I set for the vector parameters in a layer instance won’t carry over into my layer stack.
I wasn’t having this issue in 4.23, just recently updated to 4.25 preview 5 so maybe its a bug. I just get the default values when I bring my instances into the layerstack.

I’m just trying to get that working.