On Linux and macOS MenuDoubleShortcutTest fails intermittently.

Linux (Ubuntu 22.04) failure:
MenuDoubleShortcutTest > nonMacMenuBarComesBeforeScene() FAILED
    org.opentest4j.AssertionFailedError: Key press event triggered no actions ==> expected: <FIREDMENUITEM> but was: <IGNORED>
        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.Assertions.assertEquals(Assertions.java:1156)
        at app//test.robot.javafx.scene.MenuDoubleShortcutTest.nonMacMenuBarComesBeforeScene(MenuDoubleShortcutTest.java:113)

macOS 14 aarch64 failure:
MenuDoubleShortcutTest > macSceneComesBeforeMenuBar() FAILED
    org.opentest4j.AssertionFailedError: Key press event triggered no actions ==> expected: <FIREDSCENE> but was: <IGNORED>
        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.Assertions.assertEquals(Assertions.java:1156)
        at app//test.robot.javafx.scene.MenuDoubleShortcutTest.macSceneComesBeforeMenuBar(MenuDoubleShortcutTest.java:102)