Have you read the Contributing Guidelines on issues?

• I have read the Contributing Guidelines on issues.

Prerequisites

• I'm using the latest version of Docusaurus.
• I have tried the npm run clear or yarn clear command.
• I have tried rm -rf node_modules yarn.lock package-lock.json and re-installing packages.
• I have tried creating a repro with https://new.docusaurus.io.
• I have read the console error message carefully (if applicable).

Description

when write content in pages using feature Importing Markdown with tabs code inside, code is not right highlighted.

Reproducible demo

https://codesandbox.io/s/priceless-moon-5e2ptf?file=/src/pages/index.js

Steps to reproduce

import markdown mdx file with <Tabs>

Expected behavior

code blocks render colored rightly.

Actual behavior

code rendered all white/black without any highlights.

Your environment

• Public source code:
• Public site URL:
• Docusaurus version used:
• Environment name and version (e.g. Chrome 89, Node.js 16.4):
• Operating system and version (e.g. Ubuntu 20.04.2 LTS):

Self-service

• I'd be willing to fix this bug myself.