This is a known unresolved bug.
The problem seems to be that it isn’t reproducible for the developers.
In the comments of the bug report the use of a jvm parameter is suggested:
-Dprism.disableRegionCaching=true
However, if anyone is able to reproduce this very rare bug, my suggestion is to:
- modify the modena css file until the bug is resolved and share that information. it may help since caspian seems to work.
- if necessary debug into the javafx source to isolate the issue. however, the problem might run deeper, but it’s worth a shot