Having to post this from mobile because I am encountering a strange issue with the forums as of a few days ago when trying to access it from Firefox on PC.
Curious if there was just an issue on my end or if anyone else encountered a similar issue. It was impossible to post a new topic from PC because the new topic window was putting itself in an ever unreachable spot that I could scroll down to see before it loaded more topics and moved the new topic window down to meet them.
Pictures of how it looks incoming
https://i.gyazo.com/872d2f311db90eee5b94b61a8c60097b.png
https://i.gyazo.com/217401af3106d207a95eec9244879fa2.png
https://i.gyazo.com/f4e432f82435db3fd45d6fbf25a39c9c.png
https://i.gyazo.com/90f4998fb3360124390bf67bf4cd2115.png
EDIT: Found out the source of the problem, apparently one of the temporary folders needed to be fully cleared out. Was strange for it to have affected only the WoW forums (other Blizzard game forums were displayed properly) but all clear now.