Image saving issue

[centomegabit]

We have a problem with saving images attached to each posts.
This occurs randomly, not recursively.
Sometimes, even though the upload seems to be successful from the browser, then the image is not visible.
The record in the database tables is there but the file in the data and internal data folders is not there.
We have checked the permissions of the two folders in question several times, after all if it were a permissions problem PHP would not be able to save the file in any case.
We are using PHP 8.3 on Amazon Linux 2023.
The Xenforo version is 2.3.5, we recently upgraded from the latest minor of 2.2.
There are no errors in the Apache and Php logs that could indicate the source of the problem.

Any ideas?

 

[centomegabit]

Thanks to @Paul 's (xenforo) suggestion, we were able to find the issue.
Xenforo has no problems managing images in official and certified versions. In general, the problems are either inside an addon or server-side.
In our case, we were using an addon for managing the CDN on the AWS system that became obsolete after the update to XF version 2.3. As a first operation, the addon had been disabled, but only with the uninstallation (which removes all the code including the changes made by the addon) we were able to solve it.