Error Handler Extension of WIA driver not called for Windows Scan App

Question

I have a WIA2 driver with Error Handler Extension. Error handler Extension dll displays error pop up on some condition during WIA scan. Error pop up displays properly when scanned from Windows Fax and Scan Application, but from Windows Scan App, pop up from WIA Error handler is not displayed. When i try to debug, control never comes to Error Handler dll when scanning from Windows Scan App.
From the Microsoft documentation, Error Handler Extension is included in WIA2.0 and the Applications must be written to support the stream based transfer model to be able to take part in error handling architecture.
Is Error Handler Extension of WIA not supported by Windows Scan App ?