I made a tall macro, but the lef file has funny blockages. Anyone know why the met4 blockage would be this weird?

I'm guessing that this is auto-generated by magic from openlane?

I think so

It looks like a small macro? They may have setback settings on the "lef write" command that don't work so well on small cells.

At what step in the flow is the blockage created?

@Matt Venn This is created at the end of the OpenLane flow... I'm not sure what step.