Yep and Leap not displaying Finder tags – why?

I currently try Yep and Leap by Ironic Software with OS X 10.10.2. In the beginning, Leap showed me Finder tags in the file list and the tag panel on the right. Now they are not displayed anymore, but the files are still tagged (as you can see in the file information panel). Yep displays tags in the tag panel, but not in the file list. No sorting or search according to tags is possible in both applications. This happened a few days ago for the first time, then everything worked as expected. Other applications, e.g. LaunchBar, work fine with Finder tags. I unsuccessfully tried to rebuilt the Spotlight index.

Do other user encounter similar problems and what helps?