Successfully reproduced the issue. After debugging the Java and JavaScript code, I believe I found the reason why the NodeLabel parameter plug-in is not compatible with Active Choices.
Here's what the Choice Parameter drop down source code looks like.
<div name="parameter">
<input name="name" value="CCC" type="hidden">
<select name="value"><option value="1">1</option><option value="2">2</option><option value="3">3</option><option value="4">4</option></select></div>
There's a parameter DIV, followed by a name INPUT, and a value SELECT. Now here's what the Active Choices Choices drop down looks like.
<div id="choice-parameter-13064023878829" description="" name="parameter">
<input name="name" value="PARAM000" type="hidden">
<select name="value"><option value="1">1</option><option value="2">2</option><option value="3">3</option><option value="4">4</option></select></div>
Again, a parameter DIV, followed by a name INPUT, and a value SELECT. Now, here's the NodeLabel drop down source code.
<div description="" name="parameter">
<input name="name" value="NODES_PARAM" type="hidden">
<select name="labels"><option value="master">master</option><option value="manga">manga</option><option value="test1">test1</option></select></div>
The problem is that the Active Choices plugin follows a simple logic, where is tries to match the "Referenced Parameter Name" (IOW the name of the parameter that we want to grab the value) against the HTML element which name is value. As NodeLabel parameter does not have an HTML element with that name, active choices is not able to understand that it needs to use that HTML element.
It looks like the component is wrong. It is not active directory plugin, but Active Choices Plugin?