I don't know if this helps, but if you look at the physics, the forces on take-off are about the same as on landing. So if you only worry about injuries on landing, and don't pay as much attention to things like alignment during the jump, you can injure your take off leg and attached body parts too.
It's self evident that when you immobilize one joint, the nearby bones and joints have to absorb more force and movement. So, by immobilizing your main ankle joints with a super-stiff boot, you would of course force motion to occur in your knees, and in the talus joint - especially if you had an alignment issue that could create sideways sliding motion.
The problem with my theory is that such motion would mostly be a repetitive motion problem. I.E., you would have to jump a lot for it to be a problem, with poor take-off alignment. If that doesn't apply, I (certainly not a doctor) have no ideas.
Anyway, I still think only the doctor knows enough to be able to take good guesses. I'm just pointing out the take-off body part chain takes a lot of stress too.