Hello Hawellek,

I have logged this behavior with our developers in our tracking system, with an issue ID of 146402. You will be automatically when a Service Release containing your fix is available for downloading  through the case with number  CAS-118055-X3V0P6.

Hi Yanko,

you're right, but if you add another control into your example of custom filter "xamMultiColumnCombo-CustomFiltering.zip" then occurs the behavior.
I could not locate the issue, can you find the place?
So I'am back at the beginning of my problem: case insensitive in XamMultiColumnComboBox.

Looking forward to hearing from you
Hawellek

Hello Hawellek,

Thank you for your feedback. I have been looking into issue and following the provided steps I could not managed to reproduce the issue. Opening the dropdown and closing it by the mouse click and selecting another element does not make the first item selected. I am attaching a sample application(ComboIssue.zip) that I have used for my tests. Please double-check it and provide me with more details in order to reproduce it on my side.

Looking forward to hearing from you.

Hi Yanko,

in the service release 13.1.20131.2108 the error is still not completely gone
when CheckBoxVisibility="Visible" and AllowMultipleSelection="True" and someone click on the button and the popup opens and click the button again
to close it, after the control lost focus the first item was automatically selected !

Slowly it gets critical...

Kind regards
Hawellek