Definately they are working, but what are they doing you never know!! its better to spread correct information based on CIC and official govt of Canada declaration rather than some information based on assumption... my address also disappeared and reappeared last night, but if I get my visa say after 5 days, you can not say every one should get their visa after 5 days when their address reappeared.
anyways its up to you to follow this thread or no,,, but im not,,,just compare this thread with threads started by Qorax or other experts, those are much more informative and based on what CIC or Canadian govt have declared,,,
hope all of us get our visa soon.
All the best.