vertical-collection staticHeight bug

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'vertical-collection staticHeight bug'
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
		const models = [];
      const numModels = 1000;
      for(let i = 0; i <= numModels; i++) {
        models.pushObject({
          id: i,
          title: `Model #${i}`
        });
      }

      return models;
  }
});

templates.application.hbs

<h1>{{appName}}</h1>
{{#vertical-collection
  items=models
  estimateHeight=21
  bufferSize=2
  key="id"
  as |model index|
}}
  <div>{{model.title}} (index: {{index}})</div>
{{/vertical-collection}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2",
    "@html-next/vertical-collection": "1.0.0-beta.13"
  }
}