A chicken bit "is a bit on a chip that can be used by the designer to disable one of the features of the chip if it proves faulty or negatively impacts performance."
Would space-qualified logic components leave this feature in, or would the final design "best practice" of space-qualified IC take redundant features controlled by a chicken bit out of the final die?
My guess is that, if a feature with undesirable performance is left in the final die, the chicken bit could be susceptible to a bit-flip by an SEE (single event effect) or other radiation effects, thus running the risk of activating the undesired feature, and possibly affecting the mission in space.