Duplicated Standard Tasks when creating a new Request Work Task

Hi,

When creating a new Work Task in Service Management, it’s selected the option “Create from Standard Task” by default. If I select “New Work Task” and again “Create from Standard Task” the list of standard tasks is duplicated.

This is a test case:

1. After select “New” in Request Work Task, I have 2 standard task in the list:

   

2. I select “New Work Task”:

   

    

3. Select again “Create from Standard Task”:

   

4. The list is increasing if i do it several times.

Thanks in advance.

Irene