I believe the Abstract Spy boss might be broken or quite bugged.
Started first round of the map as him and then went into third person using the command /tp while in a superjump, and it instantly crashed my client. Then the rest of the server as I could tell had client crashes.
Map is arena_draft_b1
UPDATE: As a second round began with someone else as Abstract Spy, it appears that anyone within viewing/rendering distance of him will crash. This affects the boss as well if in third person. It causes client crashes, not server crash.