Sidebar title and doc title don't change after updating it in file (3)

[entire]

🐛 Bug Report

The sidebar title and doc title don't change after updating it in file, specifically after creating a new version.

similar to issue to #965 and #813

Have you read the Contributing Guidelines on issues?

yes

Environment

npm v5.6.0
yarn v1.12.3
node v9.11.1
docusaurus v1.5.1
Ubuntu 18.04 on X1 Thinkpad

To Reproduce

(Write your steps here:)

Hard to show since it's in a private repo, but:

1. Create a new version
2. Run a dev server
3. Change some mark down doc file (any title or content) in the current version, add to sidebar
4. Add a new page in the current version, also add to sidebar
5. Restart dev server

Expected behavior

• I expected the title / content to change after restarting the dev server.
• I expected to see the new page in the side bar.

Actual Behavior

• Adding a new page (.md file in the docs), it doesn't show the page at all in the sidebar
• Title in the sidebar doesn't change for existing markdown page either. nor does the content
• Updated date does not change either
• I have tried removing i18n folder and running npm run write-translations mentioned in Sidebar title and doc title don't change after updating it in file. #813, and that did not work either.
• This seemed to happen once I added a new version. This was not happening before I had multiple versions, i.e. worked when I had only one version. I currently have two version, let's call it (v1, and v2, v1 is the older version and v2 is the current version.)
• Changing the older version (v1) markdown files also show the same behavior.

(Write what happened. Add screenshots, if applicable.)

Reproducible Demo

• Could not reproduce in a fresh docusaurus project unfortunately. Happy to provide more details.

[endiliey]

When you create a new version, e.g 1.0.0

It means now you have 2 version (1.0.0 and next)

Everything in docs is next and versioned_docs/version-1.0.0 is 1.0.0

So when you go to your dev server, localhost:3000/docs/doc1 is your 1.0.0 versioned docs

And localhost:3000/docs/next/doc1 is your next docs.

@entire