https://www.syncfusion.com/feedback/51329/editannotationasync-changes-are-not-reflected-in-annotationmouseover-and
EditAnnotationAsync changes are not reflected in AnnotationMouseOver and AnnotationSelected event...
Bug reported in Blazor - PDF Viewer - EditAnnotationAsync changes are not reflected in AnnotationMouseOver and AnnotationSelected event arguments.
are notchangesreflectedevent