Static variables behave differently depending on type

I've come accross a thing i the OOABL when using static variables and methods inside a class. It seems static variables is behaving differently when it is holding an object of a class type, then when it's a simple type like int.

Example:

<code>

USING Progress.Lang.*.

CLASS TheStatic:

    def static var v_ctr as int init 0 no-undo.           
    def static var v_obj as class Container no-undo.   
   
    method public static void Increase():
        v_ctr = v_ctr + 1.   
       
        if not valid-object(v_obj) then do:
            v_obj = new Container().
        end.
        else do:
            v_obj:Increase().                  
        end.
    end.
   
    method public static int GetCurrentIntValue():
        return v_ctr.
    end.

    method public static int GetCurrentClassValue():
        return v_obj:GetCurrentValue().
    end.

    DESTRUCTOR TheStatic():
      MESSAGE "TheStatic:Destructor"
        VIEW-AS ALERT-BOX INFO BUTTONS OK.
    END.

END CLASS.

CLASS Container:
   
    def var v_ctr as int init 0 no-undo.
   
    constructor Container():
        v_ctr = 1.       
    end.
   
    method public void Increase():
        v_ctr = v_ctr + 1.
    end.
   
    method public int GetCurrentValue():
        return v_ctr.
    end.

    DESTRUCTOR Container():
      MESSAGE "Container:Destructor"
        VIEW-AS ALERT-BOX INFO BUTTONS OK.
    END.

END CLASS.

/* runner.p */

TheStatic:Increase().
TheStatic:Increase().
TheStatic:Increase().

/* Expecting 3 - 3*/

MESSAGE TheStatic:GetCurrentIntValue() " - " TheStatic:GetCurrentClassValue()
VIEW-AS ALERT-BOX.

</code>

When running this code (Runner.p) i in an editor I get the following result: 3 - 3 as expected.

However... When running it again I get the result 6 - 3. Again 9 - 3 and so forth. I would expect both numbers to increase by 3 every time.

An interesting point is that the Destuctor of the Conatiner-class is called after each run, this leads me to suspect that the garbage-collector is collecting the instance of the Container-class that is stored in the static variable even if the session has not ended (the editor is still running). The int variable however, is retaining its value between runs.

Am I misunderstanding something here?

[View:~/cfs-file.ashx/__key/communityserver-discussions-components-files/19/Container.cls.zip:550:0]

[View:~/cfs-file.ashx/__key/communityserver-discussions-components-files/19/Runner.p.zip:550:0]

[View:~/cfs-file.ashx/__key/communityserver-discussions-components-files/19/TheStatic.cls.zip:550:0]