Events are not working properly on the release 0.15.3

Also, events like "blur", "focus", (bascially everything except "click") don't work in backbone events configuration (by that I mean view events in backbone: https://backbonejs.org/#View-events ). for example: if I attach a callback to a "focus" event , the callback is never called. But callbacks to the "click" events can be called in response to the events , except "return false" seems useless.

Can you please provide live examples of what was working in previous versions and what it doesn't now?

Example 1:

events: { 
        'click button.gjs-load-doload': "doLoad",
        ...
    },
doLoad(e) {
        //as callback to a button click event, e.preventDefault() become necessary and can't be replaced 
 by return false
        e.preventDefault();
        ...
        // in the previous versions, only return false is enough to stop propagation and stop element default behaviour and there is no need to write e.preventDefault() manually
        return false;
    },

Example 2: When I try to attach event listeners, only callback to the click events can be called

       events:{
             /* click events are alright, the callback can be called */
            "click .gjs-indicator-checkbox-holder": 'toggle',
            'click .indicator-refresh-singleton':'refreshSingleton',
            /* blur and focus never works
            'blur .auto-refresh-interval-input':'updateInterval',
            'focus .auto-refresh-interval-input':'focus'*/
        },```