Uniform pins on ShaderFX nodes don't get updated sometimes #647

Describe the bug
https://discourse.vvvv.org/t/integer-input-of-shaderfx-does-not-update/21635

It looks like the shader sink that builds the shader doesn't get the shader key/name for the pin of that ShaderFX node. This also happens when using ShaderFX nodes with MaterialExtension.

Example patch in the forums thread.

It works the stage keyword is added, but then you can only have one instance of a node per shader graph. because stage makes sure that there is only one variable of that name per compiled shader.

Is there an earlier version where this still works?
maybe, hard to find out.

Additional context
Might be related to other pin issues #75 #72 #70.