Page.content not truncated in module page

Hi. I have a problem.
code like this (in module page _name):

{{ page.summary }}
{% for image in page.media.images %}
...
{% endfor %}
{{ page.content|slice(page.summary|length) }}

But page summary not truncated Not Truncating at ===.

site.yaml:
size: 1000000
delimiter: '==='

The cache is cleared.

Antimatter has in modular.html.twig

{% block content %}
    {{ page.content }}
    {% for module in page.collection() %}
        <div id="{{ _self.pageLinkName(module.menu) }}"></div>
        {{ module.content }}
    {% endfor %}
{% endblock %}

in this case the whole module content is outputted. using {{module.summary}} would instead just show the summary.

Check if your modular twig is the same.

ep. but {{ module.summary }} empty(

Is this related to this issue: https://github.com/getgrav/grav/issues/991

I was not able to replicate, but could be related to your modular template that you use to render.

i.e. bring in different div's summary and content in the modular page do not work?