I have a character, and for whatever reason her middle line is broken, and she has asymmetrical features. There is no way to fix it, I've tried using Edit Mesh, and clicking on Mirror Copy with all vertices selected, some vertices selected, none vertices selected, it always produces the same result - nothing changes. I don't even see an attempt to move a single vert from the software. Tried different mirror tolerance setting, too. It's super annoying, as in Unreal I need the character to be symmetrical, so I can also produce clothing easily.