This commit does not touch the motion subsystem, so I suspect it has been broken later.
It would be helpful if you could identify where it has been broken: Klipper Versioning, Downgrading, and Bisecting
It is sort of a “cut”/knife move for MMU?
I’m personally a little surprised that FORCE_MOVE plays well with other motions in the system.
So, I’m not sure it was intended to work, or that there was a change that explicitly removed this functionality.
(Btw, I suspect it could be emulated with an extra axis: G-Codes - Klipper documentation)
Thanks.