forums randomly logs you out
I do have the same issue.
Plus I am “forced” to use the german log in and forum when I am logged out
Try to clean your cache, cookies, everything. To limit the impact, just search for everything with guildwars2 in it and delete those cache, cookies, etc.
Restart browser. See if it still occurs.
Usually it has to do with sessions. Either on your browser or their server. If it still occurs, then it probably is on their side. However, it is hard to trace because it seems to be an isolated case. Me and my friends haven’t experienced it for example, and we login to the forums from different locations (our respective homes, offices, some even in office network).
So try that and post back here, it will help ANet