OnObjectPropertyChanged Firing Excessively when FText is Bulk Edited

If multiple game objects are selected at once and their text field is edited, instead of getting N events, it produces N-squared events.

It looks like FPropertyHandleBase::SetPerObjectValue is calling FPropertyValueImpl::ImportText once per updated field, as expected, and that in turn is tripping FPropertyNode::NotifyPostChange once per item as well. However, inside FPropertyNode::NotifyPostChange, when it collects the affected weak objects, it acquires the full original set modified objects and fires an event for each of them instead of only for the target which was just modified, which results in a total of N-squared events firing.

• Hook to the FCoreUObjectDelegates::OnObjectPropertyChanged event
• Modify text on game objects
• Observe the number of times your event handler method fires, and notice it is more than intended