A sprite 3D renders in the wrong order even with a render priority of -1

So, I imported a blender render and added a sprite3D to my game (miku right there) but she sometimes render over the 3d Model. I already had similar problem, modifying the render priority of the sprite to -1 was enough, but now, no matter how much I tweek it, nothing happens. Any clue on how to solve this rendering bug ?

https://preview.redd.it/yqgwf78fitnh1.png?width=3439&format=png&auto=webp&s=77808498e664ceb1cd533c67a15d9f476e3c68d7