Jinja2 Multi-level template inheritance issue

I have the following three files in a Django App, with the template engine being Jinja2

skeleton.html

<head>
    {% block head_content %}
        <meta charset="utf-8">
        <title> {% if page_title %} {{ page_title }} | {% endif %} Bhargavi Books & Stationery </title>
        <link rel="stylesheet" href="{{ static("css/semantic.min.css") }}">
        <link rel="stylesheet" href="{{ static("Icons/font-awesome.min.css") }}">
    {% endblock head_content %}
</head>

<body>
    <div id="navigation">
    {% block navigation %}
        <div class="ui three item menu">
          <a class="active item">Home</a>
          <a class="item">New Bill</a>
          <a class="item">View Bills</a>
        </div>
    {% endblock navigation %}
    </div>

    <div id="frame">
        {% block frame_content %}
            <p> Body content goes here. Body for {{ content_name }}</p>
        {% endblock frame_content %}
    </div>

    <div id="app">
        {% block app_content %}
            <p> APP content goes here. Body for {{ content_name }}</p>
        {% endblock app_content %}
    </div>

    {% block scripts %}
        <script src="{{ static("js/jquery.js") }}"></script>
        <script src=" {{ static("js/semantic.min.js") }} "></script>
    {% endblock scripts %}
</body>

base.html

{% extends "skeleton.html" %}
{% from "macros/globalmacros.html" import
            SUIIconList,SUISimpleList,
            SUIImageLabel,SUILabel,
            SUIActionInput,SUILabeledInput,SUIInput,
            SUIDimmableActionCard,SUICard,
 %}


{% block frame_content %}
Frame Content
{% endblock frame_content %}

{% block scripts %}

{{ super() }}
<script src=" {{ static("js/globalmacros.js") }} "></script>

{% endblock scripts %}

dashboard.html

{% extends "base.html" %}

<div>
{% block body_content %}
Body 3
{% endblock body_content %}
</div>

<div>
{% block app_content %}

DASHBOARD

{% endblock app_content %}
</div>

In this setup, Jinja renders everything except the "DASHBOARD" in the final page. However, when I add an empty block in "base.html", like so..

{% block app_content %}

App content Goes here...

{% endblock app_content %}

In the final template, "DASHBOARD" is printed. Is this some quirk in Jinja? Is this behavior defined in any docs??