Well, as I am not directly part of the Aetherlight (more like a volunteer-type), I can not answer with any surety. All I know is that Mr. Ironheart said
1. It is a known glitch
2. It is being worked on.
From those two things I can conclude that it may be a while before it's fixed. Meanwhile, since you need the Dream Cube, I suggest that you look for them with your Dreamweaver. Here are some topics that may help.