Workaround is disable the notification again after install Smart IT User Experience patch.
After you install SmartIT/MyIT, there is no impact.
I cannot list all the changes when you install SmartIT/MyIT since there is no this kind of document,
As I know, forms/workflow will be added, two new schemas will be created in DB.
Pls let me know if you have any other concerns or we can close this ticket.