Drone 2.0 - unsigned .drone.yml broken

I just got my instance upgraded to Drone 2.0.
It seems like the handling of unsigned .drone.yml is broken.
Previously, any build would show “DECLINE/ACCEPT” buttons.
The new UI just errors with “Step does not exist”. See attached picture.

The build stays in “pending” state (like before when waiting for me to click “Accept/Decline”, so I assume this is a UI issue.