NMS Issues or Model Issues?

Question

I'm currently trying to get yolov5s.onnx working in Unity. I've written a script that should, in theory, be working perfectly. Only, it isn't.

At this point, I have the issue narrowed down to being one of two things: a non max suppression failure or an issue with the model itself. I want to ask for help on figuring out which it is.

I know that, by default, the model has no problems. I'm able to use it in a python script just fine. Works perfectly. Does exactly what it's supposed to.

Python Output (what it's supposed to look like):

But when I load the model into Unity, I get these four warnings:

Which makes me wonder if my issues are a problem rooted in some inability of Unity/Barracuda to properly handle the model.

On the other hand, this is the output I get within Unity. Which makes me thing it's an issue with my non max suppression (or my post-processing in general).

So, given this, could anyone please help? (I can also show my post-processing code, including my non max suppression code, but it's pretty lengthy so I'll only do that if someone asks.)