Captions are not drawn relative to model origin

Maybe this is working as intended, but I found it surprising.

Steps to reproduce

1. Write a script with a top-level model that includes sub-models with captions. For example:

var m = require("makerjs");

function box1() {
  return {
    paths: {},
    origin: [0, 0],
    models: {
      inner: new m.models.Rectangle(10, 10)
    },
    caption: {
      text: "B1",
      anchor: new m.paths.Line([5, 5], [5, 5])
    }
  };
}

function box2() {
  return {
    paths: {},
    origin: [11, 0],
    models: {
      inner: new m.models.Rectangle(10, 10)
    },
    caption: {
      text: "B2",
      anchor: new m.paths.Line([5, 5], [5, 5])
    }
  };
}

function main() {
  return {
    paths: {},
    models: {
      box1: box1(),
      box2: box2()
    }
  };
}

module.exports = main();

2. Render the script in the playground or with SVG.

Expected result

Each caption is in the middle of its box.

Actual result

Captions are displayed on top of each other.

Workaround

Calling originate() on the overall model puts the captions into their proper places:

function main() {
  return originate({
    paths: {},
    models: {
      box1: box1(),
      box2: box2()
    }
  });
}

Commentary

I think this is very confusing, considering everything else is drawn relative to the model's origin.

If I put the caption in its own sub-model, then it works as I expected:

function box2() {
  return {
    paths: {},
    origin: [11, 0],
    models: {
      inner: new m.models.Rectangle(10, 10),
      cap: {
        caption: {
          text: "B2",
          anchor: new m.paths.Line([5, 5], [5, 5])
        }
      }
    }
  };
}

Is this the intended use case? If so addCaption is a little weird for not doing it that way.

Reproduce the nested box example in the playground or with SVG, comparing direct captions with the sub-model workaround. Start by tracing caption handling around addCaption and model positioning, then verify that each caption follows its containing model origin without requiring originate().