Blockalignment with multileader and a block doesn't work

[Jopie01]

I want to create a BOM ballon and looked at https://ezdxf.readthedocs.io/en/stable/tutorials/mleader.html#create-block-content. So I created a new block, add a circle and text for a number. I also looked at the actual code at https://github.com/mozman/ezdxf/blob/master/docs/source/tutorials/src/mleader/block_content.py and tried it.

Because those are squared and I have a round one, I didn't want leader with a dogleg, but one directly from the center which should be possible because of the Blockalignment.insertion_point and the insertion point of my block is the centre of the circle.

However, this doesn't seem to work. When I open the DXF in Bricscad, it always says that the alignment is center_extents. So I added after Line 79 a print statement to see what the actual alignment is:

print(ml_builder.context.attachment_type)

It always comes back with 0 which means center_extents. Forcing the context with

ml_builder.context.attachment_type = 1

prints a 1 and opening the DXF in Bricscad also gives now the right alignment.

So it seems something is going weird somewhere.