Platform.startup() deadlock on mac when called from class initializer

Code that uses Platform.startup(Runnable r) where the Runnable is a lambda expression, that is called from a class initializer, behaves different on mac versus {linux, windows}

On mac, there is a deadlock between the main thread and the JavaFX Application Thread.

See https://github.com/javafxports/openjdk-jfx/issues/542 for a description of the problem.