[Bug] Derby tries to rewrite model with external bindings when templates updated in dev mode

[IAkumaI]

1. I have a component with search-by-query. Something like this:

<input value="{{ query }}" />

import {Component} from 'derby';

export class UserSearchForm extends Component {
    static readonly is = 'user-search-form';
    static readonly view = __dirname;

    create() {
        this.model.on('all', 'query', () => {
            this.onSearch();
        });

        this.onSearch();
    }

    onSearch() {
        // Omitting unsubscribe old query and other stuff. It does no matter, i tested
        let $query = this.model.root.query('user', {some: this.model.get('query')});
        $query.subscribe(() => {
                this.model.ref('users', $query); // Important to create ref to reproduce the bug
        });
    }
}

2. And page template. Important to create binding with name as-ref (users) and bing it to __page

<view is="user-search-form" users="{{ _page.users }}" />
{{each _page.users as #user}}
{{ #user.id }}<br/>
{{/each}}

3. Now run and make some searches - it works. Then change index.html template (let add some symbol) in dev mode with live-update. And search again. And change template and search again and etc.

After several iterates derby will try to write to users, but there is no sets in code.
I guess this is because it tries to rewrite old items in _page.users with new search results ot someting like this.