Issue Problem loading some images when the site is accessed for the first time (no cache) but the same images are loaded when reloading the page.

[guilhermehsa]

Server operating system version

Microsoft Windows Server 2012 (updated)

Plesk version and microupdate number

18.0.46

Several domains for some reason are having several image loading problems, but they all have the same behavior:

On first access (without cache) some images are not loaded correctly, however when reloading the page the images are displayed.

In several ways I looked for some way to try to identify the source of the problem but so far without success.

Has anyone gone through something similar on a server with Plesk Obsidian (Windows) and would you like to share the solution please?

I've tested it in all the most popular browsers and in several different devices, however, in all of them this same behavior was observed:

Google Chrome / Brave / Firefox / Edge / OperaGX

 

[Dave W]

What do your logs say?

 

[Nik G]

do you have web application firewall enabled? if yes - did you try to investigate it logs and turn it off temporary ?