Spotted in our CI run, this time on Linux - unlike earlier https://bugs.openjdk.org/browse/JDK-8306373

DialogRepeatedShowHideTest > dialogSizeOnReShownTest() FAILED
    org.opentest4j.AssertionFailedError: Timeout: Failed to show Dialog ==> expected: <true> but was: <false>
        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.AssertTrue.failNotTrue(AssertTrue.java:63)
        at app//org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:36)
        at app//org.junit.jupiter.api.Assertions.assertTrue(Assertions.java:214)
        at app//test.util.Util.waitForLatch(Util.java:331)
        at app//test.robot.javafx.scene.dialog.DialogRepeatedShowHideTest.clickButton(DialogRepeatedShowHideTest.java:79)
        at app//test.robot.javafx.scene.dialog.DialogRepeatedShowHideTest.dialogSizeOnReShownTest(DialogRepeatedShowHideTest.java:66)