Layout inheritance doesn't work correcty

In post.html and page.html, the class is set to 'post-template' and 'page-template', respectively. But in the output html of article (post) and page, the <body> tag doesn't contain post-template or page-template, but contains home-template.

It looks like the inheritance of Jekyll doesn't work correctly, because Jasper theme code seems to be correct. For example, post.html contains class: 'post-template',

---
layout: default
disqus: false
class: 'post-template'
---

and any specific markdown post file (e.g., 1963-08-28-i-have-a-dream.md) doesn't override any class.

---
layout: post
cover: 'assets/images/cover4.jpg'
navigation: True
title: I Have a Dream
date: 1963-08-28 10:18:00
tags: speeches
subclass: 'post tag-speeches'
logo: 'assets/images/ghost.png'
author: martin
categories: martin
---

I'm not familiar with Ruby and not fully sure this is the problem of Jasper theme or Jekyll core.

Temporarily I can use the post-template and page-template using class tag directly in the post markdown files like below, but I think it is not the fundamental solution.

---
layout: post
cover: 'assets/images/cover4.jpg'
navigation: True
title: I Have a Dream
date: 1963-08-28 10:18:00
tags: speeches
class: 'post-template'
subclass: 'post tag-speeches'
logo: 'assets/images/ghost.png'
author: martin
categories: martin
---

Please give me an advice.

jekyllt / jasper

Layout inheritance doesn't work correcty #53