I am trying to display a parent and child select lists in Angular 18 and Angular material 18. I would like the initial parent to have "Show all" selected which then disables the child select list. Should the parent value be changed - the child select list should become enabled. It seems that when using the [disabled] input on the child - it isn't triggered on load but does work if "Show all" is subsequently selected after making changes. Any ideas - I have made this stackblitz which shows the problem. https://stackblitz.com/edit/4wkc6t Continue reading...