I've experienced some problems using WAS scanner about changes on Web App. configuration : in URL or white list for example.
As I do have a limited number of WAS Web App. available (because licence limit), some web sites have a lot of pages so that I can't process them using only one scan without reaching limits (time ou links number). So, I've made multiple scans on the same Web App. but with multiple configurations.
It seems that I do not get any more some previous findings (in detection pane or in Web App. report) when doing new scan on a perimeter that's not the same.
So, I'm looking some explanations about this behavior in order to optimize WAS configuration.