Incorrect behaviour of a link in a report in ReportViewer
I have an issue with a report that is about 10 years old.
The report is running on an ASP.net application that is running off IIS and SQL Server 2017 on a Windows Server 2018 Server machine.
The Asp.net application has a Report viewer control to view reports.
There are Hyperlinks in the report that when clicked show a new report.
Up to now when the links were clicked, there would be a postback and the new report on the same page. This is the correct behaviour.
But recently clicking on the links would open up a new page in the browser to show the link table.
What would cause the link to open up a new browser window? Something in IIS? Or something else?
What setting in IIS influences this behavour?
It is not the browser because when I debug the ASP application the ReportViewer behaves correctly.
I have the server version in one tab and the debug version in another the and only the debug version is behaving correctly.