Anyone know why this is.
I have set Org and Site preference for Affected End Items Display to No.
If a users creates a CR in a Folder or from an item in a folder then the CR does not contain section 2 "Affected End Items Display". If a users creates a CR from a Search result (Actions) then the CR does have Affected End Items Display.
As a side note, the folder actions does not include items they can not compete (we do not allow users to create a CN or Problem Reports) but on the Search actions the action is listed to create a Change Notice or a Problem Report.
Go to Organization (As per the best practice, you can try to follow it in Site as well), set the preference value to 'No'.
Lock the preference and use the action 'Delete Child Instances', that should do the trick.
Tested the option in WC11.0 M020 and its working.
And if everything fails, we can still achieve it through customization I guess.