I have an arc that is stroked and filled. I am now changing the opacity of the arc from 1.0 to 0. Now when I change the fill color, the arc is filled with the selected color but the arc is no longer transparent. So changing the fill color reverts the opacity of the Arc.

To reproduce the test, package the attached app and deploy it on Emulator

1. Save both the source files in the same directory.
2. Use JavaFX Packager and package the app for mobile platform -

javafxpackager -src . -appClass ArcTest -profile MOBILE -sign

Deploy the App on the emulator as follows -
emulator -Xjam:install=ArcTest.jad

Press Key 1 to choose appropriate fill color. Now press Key 9 to change the opacity. Check if the arc is becoming transparent (except the stroke which is another bug). Now when the arc's fill area is transparent, press Key 1 again. You will see that arc is now filled with solid color and no longer transparent