Issues with dead keys

[Oebele]

Hi,

I am using the keyboard layout "English (US, international with dead keys)".
On this layout, weird stuff happens.
- Key polling doesn't work for those keys.
- The apostrofe works as expected-ish: the first, third, fifth, etc pressed event is not recognized, but the first, third, fifth, etc released event is, and the second, fourth, sixth etc press and release events are recognized.
- The grave however behaves really weird: all key-released events are recognized, but no key-pressed events are recognized except the second.

What is going on here, especially with the grave, and is it there a way to recognize all events?

Thanks in advance, Oebele