Vindicta 'Cancel Key' not changing even after multiple tests

[DatHylian]

Changing Vindicita's 'cancel ability' back from 2 to Space and even after changing multiple times, switching to "Ability Key OR Cancel Key" when using Flight, I am only given the Ability Key ('2' in this case) as the option to cancel the ability. I've even changed the cancel key from space to a random key like 'U' and the rebind is still not being set to the chosen input.