I have noticed that every time the monster is a bot on Defend it spawns where the hunters spawn at the same time, immediately attacking the turrets.
I assume this is a bug as the player-controlled monsters always spawn where the minions spawn, but this doesn’t happen with a bot monster.
No idea if this is on all platforms, but I play on the Xbox One and I’ve encountered this over the past 3-4 days on Skirmish.
Edit: If people could tag in some Devs that’d be great. Also just happened the same again with Wraith