Usually, there's a ghost update, indicated that someone's updating/working on your application. You should check your application status daily on your GCKey, there will be a "Application Updated" on your application but when you click on it, nothing's there and your application status goes back to "Submitted". And also, your ECAS will be added 1 duplicate/additional line
My ghost update was on March 27, I called IRCC the next day, they told me that my security was passed, then approx 1 month later (April 24),I got PPR