I have had no problems with it except when someone changed their name on Instagram. I accidentally deleted that person and upon trying to add them back nothing happened. I found out later that they had changed their name and upon putting in the correct name it was back with a lot of new images and videos. It seems it doesn’t have the ability to know when someone changes their name, so if you haven’t seen any new images or videos from someone then they have either changed their name or stopped using the app.
I’ve noticed that it doesn’t auto-detect name changes as well. A tell tale sign that the name has changed or they deleted their account is that the software will be eternally saying Updating (at the bottom of the main window). Another thing to watch for is out to the side of the person who has changed their name or deleted their account will have a constant animation like it’s trying to refresh their account but all other accounts have already refreshed and the animation has gone away. Just a couple of things to tip you off if you have a lot of accounts added in the program.