If you have an interactive promotion with two or more build infos (artifacts were deployed to two or more repositories), then you have to click the button "load build" before click the button "Promote build". Otherwise the plug in do something and ends with status succeed, but nothing is done on artifactory side. Only the status is set to one of the build.
For a better usability. The user should not be able to press the button "promote build" before he had pressed the button "Load build". Or a error should be displayed. Or all formular elements should be hidden until the user pressed the button "Load build".