Template not applied for Parts within a Bag

[LMSSonos]

I have created 2 parts, lets call them WeatherPart and NewsPart. For both of them I have created templates named LandingPage__WeatherPart and LandingPage__NewsPart. Each part has rendercode something like this:

{% if Model.ContentItems.size > 0 %}
            {% for value in Model.ContentItems %}
<h1> make some html</h1>

On the landingpage I have Bag to which I add weatherpart and newspart. The Landingpage template has following code:

{% for item in Model.ContentItem.Content.BagPart.ContentItems %}
{{ item | shape_render }}
{% endfor %}

The problem is, that the Templates for Weather and NewsPart are not applied, I tried different namings but could not find out which one the correct is. It works when they are not within the Bag but directly on the page.

[sebastienros]

{{ item | shape_display | shape_render }} maybe ?

[LMSSonos]

Thanks for your fast answer. I tried that but the issue is that the template itself is not loaded. I tried to add some static HTML code to it and it does not load, what should the naming be for Templates of parts within a bagpart, is it still LandingPage__Partname or should it be Content__Partname or something different?