I remember that, it was the dumbest thing because that character had only showed a few times in the show by then.
The first time she showed up the character was pregnant, so she had a protruding stomach. Fans seemed to overlook that part and took that as her default body shape.
The second time she showed up she wasn't pregnant anymore so her stomach was flatter and then fans freaked out.
It was so silly, not just because they skipped over the fact that she was pregnant int he beginning, but also because she's an alien based on a light projection that can change into any shape she wants. Shes also a cartoon soo...