Slot Corner Radius when using tightframe

[cycada]

I have a non-rectangular PCB I'm trying to put a 2mm slot around using the tightframe option.
I've noticed that when using a normal frame, the outer corners come out with a 1mm radius, which is what I'd expect for a 2mm slot:

However when I use the tightframe, the corners take on a 2mm radius:

I tried setting millradius to zero, but this doesn't seem to affect the corners.

I'm not too sure how the board house would deal with this (fillet the corners or just reject it), so it would be nice to find out if I'm doing something wrong or it's an issue with tightframe.

I'm using these settings:

--layout "hspace: 2mm; vspace: 2mm; hbackbone: 25mm; vbackbone: 25mm; rows: 2; cols: 2; vbonecut: False; hbonecut: False" ^
--source "tolerance: 10mm" ^
--tabs "type: annotation; tabfootprints: Footprints:Tab" ^
--cuts "type: mousebites; offset: 0.2mm; prolong: 0.5mm" ^
--framing "type: tightframe; width: 10mm" ^
--tooling "type: 4hole; hoffset: 5mm; voffset: 5mm; size: 4mm" ^
--fiducials "type: 3fid; hoffset: 12mm; voffset: 5mm; opening: 2mm" ^
--page "type: A2; anchor: c; posy: 50%" ^
--post "millradius: 1mm" ^

[yaqwsx]

This is definitely a bug. The tight frame should be a panel where only a slot around the board is milled, and clearly, we violate that.

I am taking my response back; what generate is correct - see below.

[yaqwsx]

I am taking my response back; what generate is correct:

It is actually the smoothest mill outline possible.

[cycada]

Ah, that makes sense. I wasn't thinking of the corners routing in an arc like that.
I guess I was just thrown off by the radius change.
Thanks.