It's Nessa that's being munched on in the garage. It's Isa and Shuya that are being boundary fielded. But yeah, it just means that the bodies can't be moved in any way until the boundary field is lifted. That means they can be investigated just fine, but when it comes to actually moving them... that's when it'll become troublesome.
So it shouldn't hopefully interfere with Mille and Lancer much upon their initial investigation, but when Forest comes up to clean up the mess later, it's going to become far more of a pain.