I've disconnected 2 bones, with Alt P > Disconnect. They are definitely disconnected - they move independently in Edit Mode and under the Properties > Bone tab > Relations no parent is shown for them. But then when I move their former parents in Pose Mode, they follow along as though there was a Keep Offset parenting on them. That shouldn't happen, right? I've tried it several times. There's no constraint on the disconnected bone, no drivers.