Some key binds not working

I found an issue where if I press "C" default for toggle crouch I believe still works even though I don't have that key set to anything.

I also noticed that the mount/bipod hints shows up for the mouse wheel even if I set it to "V"; neither of which actually work for mounting or the bipod.

Finally using the canted sights is impossible, the hint doesn't give me a button to press and I can't find canted sights in the controls to rebind.