I have a Radzen page which opens an add dialog which is a template form. The user fills in form and hits a save button which performs a submit.
The Page submit handler executes custom angular code which does some manipulation on the passed event data and returns an object which is then used as a parameter to an invoked data source method. The data source method controller has been customized using the partial classes and methods to add validation which throws exceptions and displays a notification on screen if any issues are found - the notifications being displayed using the error branch on the handler (all developed using https://www.radzen.com/documentation/customizing-generated-application/ as an example and working nicely).
The quirk I am seeing is that the notifcation window is sometimes opening and displaying validation errors but, is coming up greyed out and unclearable - it's as if the notification is linked to the page which called the dialog rather than the dialog itself.
If I re-press the "Save" button without changing any data, then a new notifcation is displayed and not greyed out and the the original notification which was greyed out becomes no longer greyed out.