Images from Blog going missing

I've just downloaded the resources file and there are a load of perch_blog.perch_blog_author_for_post0f13586bedfcfa6d2bb352523880e4d0.cache

Not sure what these are

Perch: 2.8.10
Production mode: Production (100)
Installed apps: content (2.8.10), assets (2.8.10), categories (2.8.10), perch_blog (4.6), perch_forms (1.8.3), perch_gallery (2.8.6)
DB driver: PDO
DB tables: perch2_blog_authors, perch2_blog_comments, perch2_blog_index, perch2_blog_posts, perch2_blog_posts_to_tags, perch2_blog_sections, perch2_blog_tags, perch2_categories, perch2_category_counts, perch2_category_sets, perch2_content_index, perch2_content_items, perch2_content_regions, perch2_forms, perch2_forms_responses, perch2_gallery_albums, perch2_gallery_image_versions, perch2_gallery_images, perch2_navigation, perch2_navigation_pages, perch2_page_templates, perch2_pages, perch2_resource_log, perch2_resource_tags, perch2_resources, perch2_resources_to_tags, perch2_settings, perch2_user_privileges, perch2_user_role_privileges, perch2_user_roles, perch2_users
Users: 2
App runtimes: 
<?php
    $apps_list = array(
        'content', 
        'categories',
        'perch_forms',
        'perch_blog',
        'perch_gallery',
    );
Scheduled tasks for perch_blog: delete_spam_comments (1440 mins)
Editor plug-ins: markitup
H1: a496108ec93a57ef5aee890b0e752fb3
L1: 9f4b3fab28cb0826df4e845e286d4af4
headerColour: #ffffff
content_singlePageEdit: 1
helpURL: 
siteURL: /
hideBranding: 1
content_collapseList: 1
lang: en-gb
update_2.8.6: done
on_sale_version: 2.8.10
headerScheme: light
dashboard: 1
hide_pwd_reset: 0
content_hideNonEditableRegions: 0
content_frontend_edit: 0
logoPath: /admin/resources/music-and-the-deaf_logo.png
perch_blog_post_url: /news/{postSlug}
perch_blog_slug_format: %Y-%m-%d-{postTitle}
perch_blog_akismet_key: 
perch_blog_max_spam_days: 0
perch_gallery_bucket_mode: single
perch_gallery_bucket: default
perch_blog_comment_notify: 0
perch_gallery_basicUpload: 0
perch_blog_update: 5.0
update_2.8.7: done
perch_gallery_update: 2.8.5
latest_version: 2.8.8
update_2.8.10: done
PERCH_DEVELOPMENT: 10
PERCH_STAGING: 50
PERCH_PRODUCTION: 100
PERCH_DB_USERNAME: XXXX
PERCH_DB_SERVER: localhost
PERCH_DB_DATABASE: XXXX
PERCH_DB_PREFIX: perch2_
PERCH_TZ: UTC
PERCH_EMAIL_FROM: XXXX
PERCH_EMAIL_FROM_NAME:XXXX
PERCH_LOGINPATH: /admin
PERCH_PATH: /customers/b/2/0/XXXX/httpd.www/admin
PERCH_CORE: /customers/b/2/0/XXXX/httpd.www/admin/core
PERCH_RESFILEPATH: /customers/b/2/0/XXXX/httpd.www/admin/resources
PERCH_RESPATH: /admin/resources
PERCH_HTML5: 1
PERCH_RUNWAY: 
PERCH_ERROR_MODE: DIE
PERCH_DATE_LONG: %d %B %Y
PERCH_DATE_SHORT: %d %b %Y
PERCH_TIME_SHORT: %H:%M
PERCH_TIME_LONG: %H:%M:%S
PERCH_DEBUG: 
PERCH_PREVIEW_ARG: preview
PERCH_TEMPLATE_PATH: /customers/b/2/0/XXXX/httpd.www/admin/templates
PERCH_DEFAULT_DOC: index.php
PERCH_DEFAULT_EXT: .php
PERCH_PRODUCTION_MODE: 100
PERCH_RWD: 
PERCH_HTML_ENTITIES: 
PERCH_SSL: 
PERCH_STRIPSLASHES: 
PERCH_PROGRESSIVE_FLUSH: 1
PERCH_AUTH_PLUGIN: 
PERCH_DB_CHARSET: utf8
PERCH_DB_PORT: 
PERCH_DB_SOCKET:

Well as we all know you can't trust a client not to be deleting something, and then saying "I didn't" like some sort of 10 year old. I added the images myself by... Select or upload an image > Add Asset > drag image > Select image > Save

I'm not using the excerpt (blog thumbnail) image in the main post, which i have never done before. could have be the issue?

See code in Post and Post in list files

Post File

<article class="h-entry">
    <h1>
        <a href="<perch:blog id="postURL" type="hidden" />" rel="bookmark" class="p-name">
            <perch:blog id="postTitle" type="text" label="Title" required="true" size="xl autowidth" order="1" />
        </a>
    </h1>
    <p class="meta">
        <time class="dt-published" datetime="<perch:blog id="postDateTime" type="date" label="Date" time="true" format="Y-m-d H:i:s" divider-before="Meta information" />">
            <perch:blog id="postDateTime" type="date" time="true" format="%d %B %Y" /> 
        </time>
        <perch:if exists="authorGivenName">
            by <span class="p-author h-card"><perch:blog id="authorGivenName" type="hidden" /> <perch:blog id="authorFamilyName" type="hidden" /></span>
        </perch:if>    
        <perch:categories id="categories" set="blog" label="Categories" display-as="checkboxes">
            <a href="archive.php?cat=<perch:category id="catSlug" type="slug" />" class="p-category">
                <perch:category id="catTitle" type="text" />
            </a>
        </perch:categories>

    </p>

    <div class="description e-content">




<perch:blocks>


<perch:block label="Text Block" type="textonly">

<perch:blog id="textonly" type="textarea" label="Text" markdown="true" editor="markitup" size="s" />

</perch:block>




<perch:block label="Text with Image Right" type="imagesright">
    <img class="imageright" src="<perch:blog type="image" id="imageright" label="Image Right" crop="true" width="500" />" alt="<perch:blog type="text" id="alt1" label="Description" required="true" />" />

    <perch:blog id="textleft" type="textarea" label="Text" markdown="true" editor="markitup" size="s" />
    <div class="clear"></div>
</perch:block>


<perch:block label="Text with Image Left" type="imagesleft">
    <img class="imageleft" src="<perch:blog type="image" id="imageleft" label="Image Left" crop="true" width="500" />" alt="<perch:blog type="text" id="alt2" label="Description" required="true" />" />

    <perch:blog id="textleft" type="textarea" label="Text" markdown="true" editor="markitup" size="s" />
    <div class="clear"></div>
</perch:block>


<perch:block label="Image left and right" type="imagesleftright">

    <img class="imageleft" src="<perch:blog type="image" id="imageleft" label="Image Left" crop="true" width="500" />" alt="<perch:blog type="text" id="alt2" label="Description" required="true" />" />

    <img class="imageright" src="<perch:blog type="image" id="imageright" label="Image Right" crop="true" width="500" />" alt="<perch:blog type="text" id="alt3" label="Description" required="true" />" />

    <div class="clear"></div>
</perch:block>



<perch:block label="Image Full Width" type="imagesfull">

    <img class="imagefull" src="<perch:blog type="image" id="imagefull" label="Image Full Width" crop="true" width="1000" />" alt="<perch:blog type="text" id="altfull" label="Description" required="true" />" />

</perch:block>



</perch:blocks>



    </div>





</article>

<perch:blog id="excerpt" type="textarea" label="Excerpt" markdown="true" order="3" suppress="true" size="s" />
<perch:blog id="image" type="image" width="300" height="200" crop="true" order="2" suppress="true" />
<perch:blog id="image" type="image" width="300" height="168" crop="true" suppress="true" />

Post in List File

<perch:before>
<ul class="hfeed listing"></perch:before>


    <li class="hentry <perch:categories id="categories" set="blog" label="Categories" display-as="checkboxes"><perch:category id="catSlug" type="slug" /></perch:categories>">

        <a href="<perch:blog id="postURL" />" rel="bookmark" class="entry-title">   

        <perch:if exists="image">
        <img src="<perch:blog id="image" type="image" width="300" height="200" crop="true" />" alt="<perch:blog id="postTitle" />" />
        </perch:if>

        <h2><perch:blog id="postTitle" /></h2>

        <perch:blog id="excerpt" type="textarea" textile="true" words="20" /> 


        <div class="listfoot">
            <span class="comment">Comments: <perch:blog id="postCommentCount"/></span>
            <span class="listdate"><perch:blog id="postDateTime" format="%d %B %Y" /></span>
        </div>

        </a>
    </li>


<perch:after>
    </ul>
    <perch:if exists="paging">
        <div class="paging">
            Page <perch:blog id="current_page" /> of <perch:blog id="number_of_pages" />
            <perch:blog id="page_links" encode="false" />
            <perch:if exists="not_first_page">
                <a href="<perch:blog id="prev_url" encode="false" />">Previous</a>
            </perch:if>
            <perch:if exists="not_last_page">
                <a href="<perch:blog id="next_url" encode="false" />">Next</a>
            </perch:if>
        </div>
    </perch:if>
</perch:after>

To be completely truthful I'm not sure how long it takes before they're removed... i'd say a week? Is it the assets removing what it thinks are unused links?

If so can you turn that feature off and make all added images 'library assets'

I didn't mean literally can you do it, lol. I've added it and i'll see if it fixes the glitch...

On the same site I have that old gallery issue where a blank image is being shown on the front-end but there isn't one on the admin.

I thought this had been fixed as i've not had it come up for a while, is there a way of removing these blank images because you can't delete it in the admin because you can't see it

Thanks for the replies