CheckboxItem appears checked when initial value is false

Hello Isomorphic,
After upgrading to the latest 13.0p build, I encounter a problem with checkboxes which appear checked when their initial value is et to false.
I was able to reproduce this problem with the following very simple showcase example - running it displays a checked checkbox:

Code:

isc.DynamicForm.create({
    fields: [
        {name: "checkbox", title: "Checkbox", type: "checkbox", value: false},
    ]
});

Can you confirm this is a bug and fix it ASAP?

If it helps, I was also able to identify what I think is the culprit code which I really can't make sense of - it's in Checkboxitem.js method _mapValue line 621:

Code:

        var map = this.getValueMap();
        if (!isc.isAn.Array(map) && isc.isAn.Object(map)) value = map[value];
        else if (this.value != null) {

            value = this.value == value;
        }

I really can't make sense out of that else block... It wasn't there in the build form January which we were using before this upgrade.

Thanks in advance
Gil

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