I am developing an application where I need to do some post-processing when the user presses `CMD`+`LEFT` on a particular text-box. I need to do this *after* the browser's default functionality (i.e. after it takes the caret to first position in current physical line). 

The problem is `keyup` is **not** being triggered for the `LEFT` key (or any key for that matter) as long as the `CMD` key is down.

~~I tried this with CTRL and SHIFT keys and found that keyup gets triggered as expected for the secondary key. So if you do CTRL+LEFT and then release LEFT and then release CTRL, you get four events in total, 2 keydowns and 2 keyups. For the CMD key however, we get 2 keydowns, but only one keyup event (the one for CMD key itself when we release it in the end).~~

I tried this with `SHIFT` key and found that keyup gets triggered as expected for the secondary key. So if you do `SHIFT`+`LEFT` and then release `LEFT` and then release `SHIFT`, you get 4 events in total, 2 keydowns and 2 keyups. For the `CMD` key however, we get 2 keydowns, but only one keyup event (the one for `CMD` key itself when we release it in the end).

What could it be? Is there any way I can get `keyup` triggered for the `LEFT` key (or any key) when `CMD` is down?

I'm trying this with the latest Google Chrome on OSX 10.9.5. The behaviour is exactly the same on Firefox too. So this isn't a Chrome issue.

Demo: <http://jsfiddle.net/techfoobar/xu0o11nh/4/>

Essentially:

```
$('#mytextbox')

    // this gets correctly triggered for the meta key as well as the secondary key
    // when you press CMD and LEFT in sequence, you get two lines in the console one for 
    // the CMD key and one for the LEFT key
    .keydown(function(_e) {
        console.log('Keydown: ' + _e.keyCode);
    })

    // however, if I release the LEFT key (while keeping the CMD key down)
    // this does NOT get triggered for the LEFT key
    .keyup(function(_e) {
        console.log('Keyup: ' + _e.keyCode);
    });

```