Why are you caring about this progress bar so much?! It never meant anything. At all! It just counts the days since AOR to the 6 months mark. That's it. Your application can be finalized when your progress bar is at let's say 40% or a year after it had reached 100%. Besides, it randomly appears and disappears apparently mostly when there are some updates/changes on the website, but, once again, it has nothing to do with the processing of your application. Don't try to see any hidden meanings behind that.