PyMdown Tabbed not working with code blocks

I checked that…

• … the documentation does not mention anything about my problem
• … the problem doesn’t occur with the default MkDocs template
• … the problem is not in any of my customizations (CSS, JS, template)
• … there are no open or closed issues that are related to my problem

Description

When I implement tabs, as in the documentation, it creates the tabs but does not correctly format the code in them.

Documentation example: https://squidfunk.github.io/mkdocs-material/extensions/codehilite/#grouping-code-blocks

My markdown:

=== "Pandas"
    ```python
    import pandas as pd
    import numpy as np
    import cape

    df = pd.DataFrame(np.ones(5,), columns=["value"])
    policy = cape.parse_policy("test_policy.yaml")
    df = cape.apply_policies([policy], "transactions", df)

    print(df.head())
    ```

=== "Spark"
    ```python
    ```

Expected behavior

Tabs with code blocks, correctly highlighted

Actual behavior

Tabs with everything within them treated as plain text:

Tried copying the docs exactly (copy-pasted), same issue:

Note that other markdown is ok (for example, if you write some text and make it bold, that formats correctly)

Steps to reproduce the bug

1. Add pymdownx.tabbed and codehilite to your markdown_extensions
2. Create a .md file using the tabbed syntax in the docs
3. Place code blocks in the tabs
4. Run mkdocs serve and preview in browser

Package versions

• Python: 3.8.3
• MkDocs: 1.1.2
• Material: 5.3.0
• pymdown-extensions 7.1

Project configuration

The extensions section:

markdown_extensions:
    - admonition
    - codehilite
    - pymdownx.tabbed
    - toc:
        permalink: "#"

System information

• OS: Windows 10
• Browser: Chrome latest

[Sieboldianus]

Just a note, in the newest mkdocs Material release (8.2.4), it is also necessary to enable “alternate style” to use ===

markdown_extensions:
  - pymdownx.superfences
  - pymdownx.tabbed:
      alternate_style: true

[facelessuser]

Yeah, SuperFences is not deprecated at all, but the old tab feature of SuperFences is as we now have the Tabbed extension for general purpose tabs as opposed to code specific tabs.