Spartan Ops Enemy Glitch?

Is this supposed to happen ?, One of the Watchers appear to be stuck inside that structure, I apologize if this is in the wrong place.
Level: Episode 2, Chapter 5
Image Below

any explanation?

I think I’ve seen a few people report bugs like this.

I wonder… how many people were you playing with? The Halo engine can spawn enemies in different positions based on the player count at the start of the session; maybe there’s a bugged spawn? If everyone who experienced this bug ran into it with a certain player count,…

It happens. It’s just a glitch in the programming. It’s just like the banshees in campaign.

I play alone due to extreme lag on Spartan Ops Matchmaking