Reproduction:

1. Open Query Helper
2. Create query "instance of"-"cat"
3. Click on "Show"
4. Add "image of function". Two labels are created - "image_of_function" and "image_of_functionLabel". This is the first issue - labels should not be created for non-item properties.
5. Change it to "image". The labels stay the same. This is more minor issue, but the resulting query may come out very confusing if you do it a number of times. The label still stays there for image.