Hello Marvin,

I removed the attached archive because it contains our assemblies, and posting them publicly like this violates our EULA.

That said, I can suggest you consider using the Telerik ComboBox with its OnRead event where you can implement custom filtering, filter length, debouncing and so on: https://docs.telerik.com/blazor-ui/components/combobox/events#onread. If you need to get an entire model, you can do so in the OnChange event: https://docs.telerik.com/blazor-ui/knowledge-base/dropdowns-get-model. The Telerik ComboBox also offers templates to customize its appearance: https://docs.telerik.com/blazor-ui/components/combobox/templates

For your convenience also attaching a modified version of the sample that uses the Telerik ComboBox. The modified files are Index.razor with the combo and Shared.FormExample for the form model.

As for the BlazoredTypeahead - my best guess is that since the Window renders at the root of the <app>, its handlers bubble up to unexpected DOM elements and thus trigger its closing.

Regards,
Marin Bratanov
Progress Telerik