MacBook Pro also has the same issue (no Space event). Can you please help me by asking the testing team to verify this issue as well? Thank you

This image can help illustrate the issue described above and is very easy to verify. I connected the iMac keyboard to a Windows computer and found that the same issue exists (no Space event). Please see the image for more details.

It is not related to any specific API (such as NSViewController's keyDown/KeyUp). All Mac computer keyboards (iMac and laptop) cannot receive the 'Tab + W + Space' keys pressed simultaneously. You can verify this by testing it on any text editor - pressing the Tab and W keys together and then pressing the Space bar does not generate the Space event in the text editor. The 'WSAD' keys are typically used as the four directional keys in games and are often used in combination with other keys. Apart from the W/S directional keys, other combinations such as pressing 'Tab + A + Space' simultaneously can receive the Space event.