b129dev6 - Category disapeared in AW Random Groups

in AW in Random Groups, I created new group "Group 1" and new Category "test1" via button "+Add group" - see screen nr. 1.


Then I click on button "Change category" -> Create new: test2 and save. And category is correctly changed to test2 - see screen nr. 2.


But problem is, that now category "test1" dissapeared, when want to again change back to category "test1", there is not - see sreen nr. 3. 


Looks like it always remembers only the last created category