Progress bar only counts up the time elapsed from the date of an AOR up to date in a 6 months target period.I discovered that the percentage changed for me. It was 19% and then became 20%. No idea what it means but I think it’s too early to make any conclusions..
In other words a use less stopwatch. An applicant can get his/her application approved way ahead or beyond the targeted timeframe.
https://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=1441&top=3