This has failed in all my test runs using the jtreg/mach5 harness
on both ARM and x64 versions of macOS 12

The test log is just
java.lang.RuntimeException: Action has not been received
at bug4515762.checkAction(bug4515762.java:106)
at bug4515762.main(bug4515762.java:165)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:833)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Action has not been received
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Action has not been received

Since this is right after the robot has called
            robot.keyPress(KeyEvent.VK_M);
            robot.keyRelease(KeyEvent.VK_M);

It looks like it may be related to the problem described in https://bugs.openjdk.java.net/browse/JDK-8273520

But in this case I have not (yet) been able to reproduce it on macOS 12 outside the test harness ..

Possibly it isn't reproducing using screen sharing which is what I had to use today but it is repeatable enougj in the harness to need a bug and investigation.