The Angular MultiSelect dropdown control normally opens the dropdown popup when you click inside the search text box. But its not happening in one particular scenario in which you click right next to the last selected value (still inside the search text box).
So if you have selected some values already and you want to open up the popup again to select more then you have to click approximately a couple of centimeters away from the last selected value in the text box. I can see this happening in the simple demo available in the documentation as well.
Has anybody else observed the same?