Step to reproduce:
1. create class diagram
2. place two classes 'a' and 'b' to the diagram
3. make 'a' inner class of 'b' (use Nested Link)
4. select 'a' and add 'final' modificator to its declaration in source code.
5. click on 'a' element.
6. add 'static' modificator to the declaration of 'a'.
7. change Leaf property of 'a' to 'False'
8. Click 'a' element
'Static' modificator lost, there is only "public class a" , but should 
be "public static class a".

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Evaluation:
reproducible with coco/coke