FEATURES BY STORIES is missing

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#### I'm submitting a ...
- [ x] bug report
- [ ] feature request
- [ ] support request => Please do not submit support request here, see note at the top of this template.

#### What is the current behavior?
In the allure home page the FEATURES BY STORIES is missing.

The section is correctly showed up to ver 2.20.1.
More recent versions included 2.24.0 do not show the section FEATURES BY STORIES anymore.

#### If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem
1. GO to the allure WEB homepage

#### What is the expected behavior?
The FEATURES BY STORIES section should correctly showed.

#### What is the motivation / use case for changing the behavior?

#### Please tell us about your environment:

- Allure version: 2.24.0
- Test framework: behave
- Allure adaptor: allure-behave@2.13.2

#### Other information

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Allure の Web ホームページから開始し、Allure 2.24.0、allure-behave 2.13.2、および提供されたレポートコンテキストを使用して、欠落している FEATURES BY STORIES セクションを再現します。結果をバージョン 2.20.1 と比較します。新しいバージョンでセクションが存在し、正しく表示されれば完了です。

索引モデルが issue の本文から書いたものです。