Freezes on the call to java.awt.Window.getWindows(). Likely due to some mutex contention in the Window module.

So far this has only been observed on a Mac machine. It occurs consistently, but we have not been able to reproduce on Windows or Linux.

I don't have a Mac so any information/debugging from someone who has one would be very useful.

As a temporary workaround, it is fine to comment out the entire for loop that disposes the windows.