EventHelper.onTransitionEnd calls its handler using globalThis if globalThis.callback exists

[ExtAnimal]

Forum post

The code which executes the callback just checks for presence of thisObj.callback. If that exists on window, then it will be called.

We should only use that is the thisObj is an instance of our Base class:

Should be

            doCallback        = () => {
                detacher();
                if (!thisObj.isDestroyed) {
                    if (thisObj.$meta?.class.isBase) { // <-- The fix. If it is an instance of our Base class
                        thisObj.callback(handler, thisObj, callbackArgs);
                    }
                    else {
                        handler.apply(thisObj, callbackArgs);
                    }
                }
            },