How to make productcockpit' listView enum column selectable

Hi, I added 2 columns to productcockpit's listView. They are enum and User types. A Business requirement says when I set values in them combo boxes / lists with possible values should be shown. I added them in the same way and I get combo box for Users, but I don't get combo box for Enum types. Instead of combo box / list, I get only autocomplete function. Why this happens / behaves different and how can I fix this? I have tried by adding selectable="true" (although it's default) to property tag, but it didn't help.

listViewContentBrowser_Product.xml:

 <property qualifier="product.deviceManager" visible="true" />
 <property qualifier="product.testProductStatus" visible="true" selectable="true"/>