AlertController event propagation issue

hi all,
i have some issue with "AlertController"
my layout includes a number of “ion-range” bar and a button at the bottom. when user click on button, i calls an api , if any error of connection or any other error, an alert will display(instance of AlertController). when user click on “ok/cancel” buttons, it propagates the click event to the background and change the value of “ion-range”, that is just below the “ok/cancel” buttons.
so i brief is their any way that i can stop click event propagation of alertCtrl.
Please help me in this. any help will be appreciated