After using your saveword in a current game version (Release 57 / Serial number 140901)
>nav lab
[...]
>nav library
[...]
Coming into the library, you notice that Fang isn't at his usual spot and as you look around, you just catch sight of the end of his tail as he vanishes up the stairs [...]
...so the Fang + Carl event immediately fires. Watched them do it, waited 8 turns, fucked Carl. Hm, really having trouble of recreating what bug is going on on your end.