FormCombobox is empty on the first load of the view (CustomersView/OrdersView)

[codingdna2]

Repro steps

As soon as the program opens, switch to Customers view (or Orders view). The detail panel on the bottom right shows the Country combo box empty. As soon as a different record is selected, the issue disappears.

System

Visual Studio 2017
Windows 10 Build 1803

[codingdna2]

As a workaround, I found that changing the SelectedValue binding, from {x:Bind} to {Binding} fixes the issue. I've no idea why...

[dishantmshah]

The issue seems to be appearing while running an App only in Debug mode.

[KBaluh]

It's appear when you didn't load dictinaries before set Item.
At the current momen we binding to LookupTableProxy, but better to make IList in CustomerViewModel and load before set Item.
I confirm that bug.