Multiselect view behavior

hi in my page i have two multiselect views. The second works as expected, but the first one change values only when it is empty if i selected one value and try to select next the event onChange does not work

The code for two views identical only different id’s

{
	view : "multiselect",
	id : "NewOptions",
	name : "NewOptions",
	label : "New Options",
	minWidth : 320,
	labelWidth: 120,
	options : {
		data : listOptions
	},

	on : {
		"onChange" : function(newv, oldv) {
			dynamicUpdate($$("objId").getValue(),
					"NewOptions",
					"NewOptions_backend", newv, oldv);
		}
	}
}

Hello, @roma
Could you, please, provide us a snippet that reproduces the problem, or please tell us what the dynamicUpdate method does. If there are any other methods that affect this component, please tell us about them.
Also, we would kindly ask you to test your code with debug version for any errors.

Thanks found the problem i use blockEvent and does not use unblock now it works fine!