I'm not sure which realms are affected, but it's nice to know that this is being worked on anyway; the glowing tree promises that they are actively receiving updates from the (unnamed) parties involved. There is currently no ETA on a fix. I'll keep you posted if I hear anything else. In the mean time, let's start building a list: if your realm is acting up, let us know in the comments.
Update: Drysc is saying the issue "appears to have been resolved," but they're still keeping an eye on it.