Wyrdness on 29 January 2019
Mr. X is programmed to be tethered to you so if you get too far from him or hit certain script triggers the game teleports him to you but in a weird way, rather than actually move him to your vicinity it simply spawns another Mr. X near by and despawns the other.
However the game can some times glitch and fail to despawn the previous Mr. X leading to this situation where the are two active in game.
