Cmd key releases are undetectable on Mac.

I wrote a small test program which outputs a log statement like this:

public void handle(KeyEvent event) {
logger.info(
"Key released alt=" + event.isAltDown() +
", ctrl=" + event.isControlDown() +
", meta=" + event.isMetaDown() +
", shortcut=" + event.isShortcutDown()
);

The output from this proves, that Cmd KeyEvents do not work as expected on Mac. Here is what I did:

1. I pressed Alt and while holding Alt down, I pressed and released K. This prints
INFO: Key released alt=true, ctrl=false, meta=false, shortcut=false

2. Then I released Alt again, and then I got
INFO: Key released alt=false, ctrl=false, meta=false, shortcut=false
as you would expect, since all keys are now released.

3. I then pressed Ctrl and while holding Ctrl down, I pressed and released K. This prints
INFO: Key released alt=false, ctrl=true, meta=false, shortcut=false

4. Then I released Ctrl, which prints
INFO: Key released alt=false, ctrl=false, meta=false, shortcut=false
- again this is as you would expect.

5. Then I pressed Cmd, and while holding it down I pressed and released K. This does not print anything at all.

6. Then I released Cmd, and got
INFO: Key released alt=false, ctrl=false, meta=false, shortcut=false


This proves three problems
A. No matter what I do with the Cmd key, meta is never true, which is quite problematic on Mac, since it is the primary shortcut key on Mac.
B. Shortcut was never true, neither when Ctrl was held down (as on Windows), nor when Cmd was held down (as you would expect on Mac).
C. As step 5 shows, holding the Cmd key, seems to block other keyboard input (in this case pressing K).