Sorry for the double post.
The designer is where I see the problem. Default flows are not preserved when importing XML models with default flows.
When modeling default flows in the designer, they are not present if you re-edit the same model. Nor are the graphical mnemonics present on the diagram in the explorer.
I have not tested with the engine as I don't want to use these if they're bugged. Instead I just add a conditional to every flow as a workaround
