asset_hash doesn't work on a specific date article

In frontmatter,

---
title: awsome title
date: 2015-11-24
category: web-app-dev
tags: rails
---
![massmass](images/massmass.jpg)

This outputs following

<img alt="massmass" src="/articles/2015-11/24-awsome-title/images/massmass-ae774e7d.jpg"/>

As I expect, the hash is appended.

But in the case I change the date in front matter and article file path like following, hash isn’t appended.

---
title: awsome title
date: 2015-11-25
category: web-app-dev
tags: rails
---
![massmass](images/massmass.jpg)

outputs following.

<img alt="massmass" src="/articles/2015-11/25-awsome-title/images/massmass.jpg"/>

For your reference, the actual file is renamed as I expected in either case.

It seems that article of specific date doesn’t generate hash.
Why does this happen?

You mean: your source file has its name changed too, right? Was that 25-11 date in the future or in the past, when you worked on this?

Thank you for your reply. And sorry for my late reply.

You mean: your source file has its name changed too, right?

Yes. I changed source file name like the following.

source/articles/2015-11/24-awsome-title/index.html.md
source/articles/2015-11/25-awsome-title/index.html.md

In my config.rb, the path of source is set like this.

blog.sources = "articles/{year}-{month}/{day}-{title}/index.html"

Was that 25-11 date in the future or in the past, when you worked on this?

In the past.

Thank you in advance.