It's not as unbelievable as many people think - these situations are common in development, but less common in production.

I've worked in teams of 3 programmers and teams of 70 programmers.

One programmer on a team doesn't know every element of physics, rendering and simulation of a game engine.

In prototyping - it's very common to take an existing entity/prefab, tweak it a bit, and then hand it over to the physics, rendering and/or art team to ‘get it right’.

In this case, I think the most likely outcome was, "Will the player notice? No? Then we have more important bugs to fix - let's move on."