Problems loading a specific webpage

[litusbdn]

Good Morning,

For some time, when I visited the website of the Catalonian education department, the web does not load correctly, it seems as if some of the images do not load correctly. The problem only appears in a specific page of the department: http://educacio.gencat.cat/portal/page/portal/Educacio/PCentrePrivat/PCPInici#contenido

On an earlier occasion the same thing happened to me, I reinstalled Opnsense and the problem seemed solved, but it has happened again.

I have activated the web proxy, and disabled the cache, but the network in which the computer is located has excluded the pass through the web proxy.

Thanks!

[fabian]

Does this happen because elements are loaded via TLS?
What is the response of the proxy (web development tools of the browser should show the content in the network tab)?