Jagged edges on the model after baking

Hi everyone!
I created a simple, slightly conical circular band model in Blender (image 1). After UV unwrapping (image 2), I then exported the high- and low-poly models in FBX format.
In Substance Painter, after baking, I get noticeable jagged edges on the model (image 3).
For baking, I set the antialiasing to Supersampling 16x, and the output size on 4096x4096.
After baking, there are jagged edges (image 3).
Why does this happen and how can I fix them?

Thanks so much!