Got already sponsor's approval. However, there is one friend's address where sometimes I used to stay when the schedule was tight as interview places were near by for the commute purpose. That was address was not listed in any ID.You can try to send it as a web form but no guarantee it will catch up with your application, you should hear from IRCC within a couple of weeks, if they can't find your app in the system yet it means it hasn't yet been entered in the system, nothing to worry about at this point. Once you receive AOR submit it again with your UCI number to ensure they get it.
Should I bother and put it as a overlapping address for a particular period? I am not sure adding now should not impact the application or just leave it.