Hi guys;
Autoptimize does not do anything to images, so that would not really make sense (I’m the developer ?? ).
Now as far as “wordpress looking for images” is concerned, per the default .htaccess;
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
</IfModule>
and specifically the !-f line, requests for existing files (including images) are not handled by WordPress, but by your webserver (Apache, probably). Can you check if this is in your .htaccess as well (and that .htaccess does not contain any “funky” stuff for images)?
Next up I would check the image size of the images that seem to be slower. How big is it (are they), can you optimize them with https://optimizely.com/ (great tool)?
Last remark: in my experience it is not abnormal to see Apache serving a file slower on occasions, but it would be “on occasion” and it Would not always be the exact same file.
Conclusion:
could it be that image loading is much slower from outside /wp-content/uploads or it does not matter?
No, it will very probably not matter ??
Hope this helps,
frank