There are a lot of images that should be printed on the pages on our self-hosted Jira setup. You can simply leave the browser tab open and the images will still be loading. This does not include every single image, some user avatars do show, some do not, the Jira logo in the left top corner does not seem to load, some issue prio icons will show and some will not.
This issue does not seem to happen all of the time, but if it does it seems to be persistant for a long time (+15 mins at least).
Jira runs on a clean install of CentOS 6.5 with nothing else running then the nescessary services for Jira. Jira runs in version 6.3.1.
Edit: This issue is now persistant throughout the day (5+ hours), even restarting Jira does not make a difference
Edit 2: While trying to use Jira in the meanwhile, it seems that actually almost every image keeps loading, except for my own profile avatar.
Update: It seems that Google Chrome is having problem with the external DNS record through which I request Jira. When opening http://issues.<ourdomain.ext>:8082 it is not able to show images, weird thing is though, when opening http://<local-ip>:8080 it's working as expected. Even weirder, when on the external version, we can open images which are unable to load in new tabs and they simply show up. In Firefox both versions work fine.