Version: Atum2-1.12.2-2.0.0.alpha157

Overworld spawn (after death): -122/64/192
Atum spawn (after death): -131/69/202

Portal coordinates (in atum): -509/64/67
Portal coordinates (in overworld): -512/64/64

As you can see it spawns me back to the overworld spawn coordinates, not near the nearest or latest used portal or whatever logic you want to use.

Not an issue. Meant to be this way. No distance "cheating" for portals like the nether.