The changes in JDK-8151756 broke my application who uses getUserAgentStylesheet().

It looks like the stylesheet provided is only applied under certain conditions (in my case always the first time I add the Node of this type to the SG).

I've been unable to create a stripped down version but I know my code worked in u92 and starts to break with u102.

I can fix the problem for now by calling Platform.runLater( () -> {impl_reapplyCSS();}); so the CSS is applied if I force it to happen!