Hi Doctor Ngobeni,
The Summary is not considered to be a differentiator to identify this as a new Alert.
The cause of the problem is still the same, and thus SOI considers this to be the same Alert the Operator is working on.
If you have cases where the new message is due to a different problem, but it still gets merged with the existing one, then we should have a look at the policy how the Alert ID is created to distinguish between different root causes.
As background: If the summary would be considered to trigger a new Alert (e.g. replacing the previous one), cases like "Disk is full 94%" then "95%" then "96%" would always be considered a new problem, although the Operator is already aware of this and working on it.