Being an open world game, The Witcher 3 is prone to exploits and glitches. But this little fix, added with today's patch, takes the cake. In order to keep players from exploiting a particular money glitch (by killing cows, meditating until they respawn and reaping the loot they drop), the "Deploys the Bovine Defense Force Initiative" part of the patch makes sure no cheaters get away with it. Now, when you try the exploit, the game spawns a massive, certain death-level monster.
We tried it out for ourselves with the PS4 version of the game, and sure enough, a fearsome chort came out after the second respawn and made an honest (and dead) witcher of us.