Adding shapes dissapears vector graphics group

Hi,

Looking for some way to replicate the line color bug,
i found an odd problem.

Using "Add shapes" in a group of vector graphics,
that use a stroke shape outline, produces the
dissaparition of the whole group.

Check the attached file.

1) Select grouped vector graphics that use a
stroke shape outline.

2) Use “Add shapes” to convert
graphics in one solid shape

3) All Vector graphics dissapear!

Why this happens?

alejandro

Yes it appears to be a combination of the line profile and grouping.
If you un group the three shapes and then select 'Add Shapes' they will combine to one black shape without a line.