BLOCKED_BY_ORB issue running Penpot locally

Hello Penpot friends :wave:
I’ve recently installed Penpot on my Raspberry Pi 4b using Umbrel and besides one issue it works fine.
As you can see in the screenshots the UI and everything else works fine but all preview assets can’t be loaded since the url to the assets are missing the port (:9001). When I add the port manually the image is loaded so its not a writing permission issue but reading. Is there any configuration I can try to change?

Thanks in advance and have nice Weekend,
Hoffi