Neato overlap=false doesn't respect initial positions much

[Cireo]

When generating a neato graph with overlap=false (and some other options)

digraph {
graph [splines=false, nodesep=1, overlap=false, outputorder=edgesfirst]
  node [fixedsize=true, pin=true];
  n1 [pos="x,y"];
  n1 -> n2;
  n2 [pos="x,y"];
   ...
  node [fixedsize=true, pin=false];
  n3 [pos="x,y"]
  n3 -> n1;
  n4 [pos="x,y"]
   ...
}

the positioning isn't respected well compared to dot -Kneato -Tsvg (OSX 5.0.1, and other versions).

Source file: eg.dot.txt

$ dot -V
dot - graphviz version 5.0.1 (20220820.1526)
$ cat eg.dot | dot -Kneato -Tsvg > eg-system.svg

$ grep node-graphviz@ pnpm-lock.yaml
  /[email protected]:
$ cat eg.dot | node -e 'require("node-graphviz").graphviz.neato(require("fs").readFileSync(process.stdin.fd, "utf-8"), "svg").then(console.log)' > eg-node.svg

Node (overlap)

System (overlap)

It seems to try for smaller numbers of nodes, but everything gets jumbled around afterwards.
If overlap is removed, the graphs are roughly equivalent.

Node (no overlap)

System (no overlap)