for="" is checking multiple inputs

There is not much to say about this... Its really weird... I have some <label> tags they contain <input> from type checkbox. Every label have an unique for that is bindet do the same named inputs id.. I did it exactly like w3c on the demo site: https://www.w3schools.com/howto/howto_css_custom_checkbox.asp

Demo: https://stackblitz.com/edit/angular-fzbvx5