ADDITIONAL SYSTEM INFORMATION :
jdk8, jdk12, jdk14

IMPORTANT: On macos with jdk8 or jdk12 it works

A DESCRIPTION OF THE PROBLEM :
When i try print from java or javafx on JDK 8, JDK 12 or JDK 14 i got the same error:

2019-08-09 22:59:20.914 java[49747:4453762] Cocoa AWT: Running on AppKit thread 0 when not expected. (
0 libawt_lwawt.dylib 0x00000001398340fc nsPrintInfoToJavaPageFormat + 49
1 libawt_lwawt.dylib 0x0000000139833f46 Java_sun_lwawt_macosx_CPrinterJob_getDefaultPage + 49
2 ??? 0x0000000119fc3c90 0x0 + 4730928272
)
2019-08-09 22:59:20.914 java[49747:4453762] Please file a bug report at http://bugreport.java.com/bugreport with this message and a reproducible test case.


IMPORTANT: On macos with jdk8 or jdk12 it works

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
I made an example to test:

https://github.com/prsolucoes/jrprintpreview

Run:
mvn clean
mvn compile
mvn javafx:run

In the application click on "print" or click on print from preview

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Print the report to printer.

IMPORTANT: On macos with jdk8 or jdk12 it works