I received a fracture from a bear trap. I used a splint and after the break had healed and the splint had gone into my inventory I was unable to sprint or jump/climb.
I have relogged twice and tried rebinding the sprint and jump keys with no effect.

Edit: I was playing on 3pp. I joined the 1pp server and it worked fine. Will try the 3pp again now.

Edit: Different 3pp server, same thing, unable to sprint or jump/climb.

Edit: The only fix was to let my character pass away in the night as the session was unplayable.