I'm working on MAC, my Keyboard is HP, previously I didn't have this problem on PC. Now every time I press any digit on numpad the window closes automatically,  it doesn't allow me to enter any digit from right side of the keyboard. Numpad turned on. Does anyone know how to fix it?

The topic title has been edited to improve findability by @alina.balkanskaia. Original: Numpad doesn't work in Attribute Editor window