I also got ghost update for the wife on July 4th, no change since then. She gave fingerprints in early May, background still not completed. My application shows BG completed already.
I am exactly the same. Completed biometrics, but no update on the tracker. Last updated 02-May; one day after the fingerprints request. The tracker is not always up to date.
How did you find out the processing centre, did you contact IRCC?