Aurelia router-view inside dialog not working on reopening dialog - aurelia

Question

As per example given in aurelia documentation I am opening dialog box with viewmodel (say prompt ). This prompt has view inside in which I am adding "router-view" tag.
My routes are already configured. So when first time I open dialog it opens correct views as configured in routes and everything works well. But when I close dialog and re-opens dialog, It's not showing first route view. If I click other route link and come back to first route it works.
I have observed it's not creating instance of view model of first route( when opened dialog second time).
How to fix this issue?
Prompt html
<template><div class="row">
<left-menu ></left-menu>
<router-view></router-view>
</div></template>
<template>
and left-menu.htm
<template>
<div class="list-group">
<template repeat.for="item of items">
<a class="list-group-item ${$parent.selectedNav === item.routeName ? 'active' : ''}" route-href="route.bind: item.routeName;" click.delegate="$parent.select(item)">${item.text}</a>
</template>
</div>

Answer 1

Using a router inside a modal window seems off to me. The router is used to manage pages, but a modal is used to manage content within a page.
I would suggest building a modal window component, you can use <slot> tags to inject content and set it's model bindings to any data within the current view model.
Here's an example of my component that I use for this.
<template>
<div show.bind="visibility" class="modal-window">
<div>
<button class="btn btn-danger btn-sm close-button" click.delegate="close()">close</button>
</div>
<slot></slot>
</div>
<div show.bind="visibility" class="modal-window-overlay" click.delegate="close()"></div>
</template>
-
import { bindable } from 'aurelia-framework';
export class ModalContent {
#bindable visibility: boolean;
close(){
this.visibility = false;
}
}
<modal-content id.bind="'add-variant-window'">
<h4>Modal Content</h4>
<div>you can bind this to things on the current viewmodel</div>
</modal-content>