Device assignment selector 'Suitable only' not works as expected

1.Start SYCON.net and instantiate device with multiple hordware ports DTM in empty project
2.Open DTM configuratuion dialog - Device Assignment page are active , 'Suitable only' filter are active by default and
the device with multiple hardware options are in device listing
3.Set filter to 'All' , wait device list to be populated and close dialog by pressing OK button
4.Open DTM configuratuion dialog - Device Assignment page are active , All device filter are active
and the device are in device listing
5.Set filter to 'Suitable only' , wait device list to be populated

-> device is not visible anymore