Now that the dust has settled, why didn't she draw Coco?

She promised to draw every hololive member didn't she? Seems strange that the one who draws every hololive member for any remotely singificant event coincidentally doesn't draw Coco when she's graduating (arguably the biggest hololive "happening" in history), doesn't it? Especially during the "appreciation ritual" days. So many Hololive members drew Coco even though they normally don't draw.
But the designated artist whose "thing" is drawing other holos didn't. Sure seems strange. It's just a coincidence right? Right?