I’m using DialogService.OpenSideAsync and I want to update dialog properties while it’s open as described here: Blazor Dialog Component | Free UI Components by Radzen .
When attempting this with an OpenSideAsync dialog I get an exception because [CascadingParameter] private Dialog _dialog { get; set; } is null.
This can be reproduced with your component demo site. Update the source on the component linked above by replacing OpenAsync with OpenSideAsync and then attempting to trigger updates to the component.