We recently upgraded to K2 5.1. We installed some of the pre-built Apps and created App using the App Wizard. Everything works well except when we need to select a user. For example, it is possible to define the list of Administrors for an App using the administration forms. When we try to add a new administrator, we key in the user name and the system goes into an infinite loop (we waited up to 20 minutes and never got a result). In case this is relevant, we use Windows AD.
I checked the administration form and the picker used to select a user is based on the UMUser SmartObject and call the "Get Users" method. The selected Filter Properties are FQN and DisplayName.
I created a view from scratch with a picker and reproduced the issue. If I uncheck FQN in Filter Properties, it works fine. Bug?