Autocomplete mode causes error when closing window

Question

I am trying to use autocomplete mode for textboxext. Autocomplete works fine but when i close the window on which the textbox is on i get an error:
"System.InvalidOperationException: 'Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead.'"

I am using "standard" binding to observableCollection in viewmodel:

<sf:SfTextBoxExt HorizontalAlignment="Center"
     VerticalAlignment="Center" Width="150"
                            SearchItemPath="Name"
                            AutoCompleteMode="Suggest"
                            AutoCompleteSource="{Binding AvailableProducts}" />

where could be the problem?

Keerthana Jegannathan · Answer

Hi Tadej, 
 
We considered this issue “InvalidOperationException has been thrown when SfTextBoxExt has got focus” as bug and a support incident has been created under your account to track the status of this requirement. Please log on to our support website to check for further updates. 
 
https://www.syncfusion.com/account/login?ReturnUrl=/support/directtrac/incidents  
 
Regards, 
 
Keerthana J