Not a bug. The reason here is the same why fucking the analyst instead of killing him increases suspicion level: without the analyst's memories the MC isn't aware trying to pass the gate will result in a failure (and increase suspicion) because the analyst doesn't have necessary credentials. If you kill him, you eat his brains and know that there's no point trying and you need a better disguise.2) Stray Puppy (I think this is a bug)