I use javafx embedded browser: new WebView().getEngine();

After page is loaded if I click with right mouse button on page then two popup windows opened:
First - in top left corner
Second - near cursor, as expected

It happens on OS X 10.10

java -version
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)