I ran a full test on macOS 15 and saw the following two failures. At least the first of them is intermittent, failing about 50% of the time for me. I haven't rerun the second multiple times to know whether it is intermittent as well. I don't know whether this is a product bug or a test bug -- possibly the latter, given the intermittent nature of at least the first failure.

DoubleShortcutProcessingTest > testDoubleShortcut() FAILED
    org.opentest4j.AssertionFailedError: Timeout: Dialog never received shortcut ==> expected: <true> but was: <false>
        at app//org.junit.jupiter.api.AssertionUtils.fail(AssertionUtils.java:55)
        at app//org.junit.jupiter.api.AssertTrue.assertTrue(AssertTrue.java:40)
        at app//org.junit.jupiter.api.Assertions.assertTrue(Assertions.java:210)
        at app//test.util.Util.waitForLatch(Util.java:330)
        at app//test.robot.javafx.scene.DoubleShortcutProcessingTest.testDoubleShortcut(DoubleShortcutProcessingTest.java:67)

MenuDoubleShortcutTest > acceleratorOnlyInMenuBar() FAILED
    org.opentest4j.AssertionFailedError: Key press event triggered no actions ==> expected: <FIREDMENUITEM> but was: <IGNORED>
        at app//org.junit.jupiter.api.AssertionUtils.fail(AssertionUtils.java:55)
        at app//org.junit.jupiter.api.AssertionUtils.failNotEqual(AssertionUtils.java:62)
        at app//org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:182)
        at app//org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:1152)
        at app//test.robot.javafx.scene.MenuDoubleShortcutTest.acceleratorOnlyInMenuBar(MenuDoubleShortcutTest.java:121)