Hi,
From what I understand whenever we hit Enter in an input it will trigger a click on the primary button, even when the input(s) is not in a form.
Looks like a weird behavior, at least the DialogButton should be set as a sumbit button.
For now its just because it contains .e-primary css class that it triggers a submit.
Please consider submit only if the type of the DialogButton is
Syncfusion.Blazor.Popups.ButtonType.Submit.
It's particularily not convenient when we use a SfMultiSelect with AllowCustom="true", because users will often validate a custom value by pressing Enter.
Repro : https://blazorplayground.syncfusion.com/BtBxDHMxSsiihFJf
Regards,
Julien