Property transfer bug

Hi there,
I want to let you all know that I've found a bug in SoapUI. I'm working on version 5.7.0.
Reproducable steps (see attachments):
1) Open a window of a property transfer teststep and notice what property is shown at the moment in the field "Property"

2) While this window keeps at the foreground you navigate to the testcase or testsuite where this property is stored 

3) Go to tab "Custom Properties" and click at least twice on the green arrown down button 

4) Notice that the property, I mensioned earlier, keeps changing to another property every time you click on that arrow

Step 1Step 2Step 4