A clipboard systemtest (test.javafx.scene.input.ClipBoardTest.testCopyUTF8String) fails intermittently when using the Headless glass platform.

Stacktrace:
    org.opentest4j.AssertionFailedError: expected: < Jump to: 😃💁 Jump> but was: <HEADLESS_TEST>
        at app//org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
        at app//org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
        at app//org.junit.jupiter.api.AssertEquals.failNotEqual(AssertEquals.java:197)
        at app//org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:182)
        at app//org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:177)
        at app//org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:1145)
        at app//test.javafx.scene.input.ClipboardTest.testCopyUTF8String(ClipboardTest.java:94)