captions.txt doesn't send all the captions

[PtitLutinn]

I
i'm runing the pluging to make a galery, i use my own theme.
i'm running this code :

<div id=galerie>
	{{ page.content }}
	{% for titre, gallery in page.photo_gallery %}
	{% for name, photo, thumb, exif, caption in gallery %}
	<a href="{{ SITEURL }}/{{ name }}.html" class=image_lien><img class=img_galerie src="{{ SITEURL }}/{{ photo }}" title= "{{ name }}" alt="{{ caption }}"></a>
	{% endfor %}
	{% endfor %}

</div>

i choose to use the caption.txt for the alt text of my photos, but on 5 tests photos only 2 have their alt. The name of the pictures are ok and i have reload the site numerous times.

I run pelican on archlinux on a venv with python 3.12.

thanks for help
nael