Bulk change in the UI can apply to a large number of issue. In this case, one "issues resolved as FP or Won't fix" notification is sent per issue, which can generate lots of emails. This creates noise (spam?) in our users mailbox and reduces the value of the notification.
To fix this situation, a single email should be sent by recipient of the "issues resolved as FP or Won't fix" notification bulk UI change.
Subject: Issues marked [False Positive|Won't Fix]
A manual change has resolved [an issue|issues] as [False Positive|Won't Fix]:
Rule S123 - Don't do bad things
Rule S234 - Don't do slightly bad things See issues ,
Rule S345 - Blah blah blah
You received this email because you are subscribed to My New Issues notifications from [instance].