It seems like Active Choices Reactive Reference parameter is not able to reference a Node/Label paremeter.  Basically, it would be useful to dynamically define default build parameters given a node or label.  The Active Choices developers pointed out

it depends on the parameter type. It should work with the default parameter types of Jenkins. If your parameter is provided by a plug-in, it depends on whether the plug-in created the parameter with the default DOM structure. If not, then we need some tweaks in JS first