Bug - Sidebar content overflows sidebar container on Chinese document template page

[AmnestyAM]

Describe the bug
Sidebar content overflows sidebar container on Chinese document template page

To Reproduce
Add steps to reproduce the behavior:

1. Go to https://www.amnesty.org/zh-hans/documents/nws21/005/2010/zh-hans/
2. Observe the right‑hand sidebar (grey area) that contains related content.
3. Scroll through the page.
4. Notice that some sidebar elements (e.g., long titles or embedded content) extend beyond the sidebar’s width into the main content area.

Expected behavior
All elements inside the sidebar should be constrained within the sidebar’s width, maintaining clear separation from the main content regardless of content length or viewport size.

Actual behavior
Certain sidebar elements overflow the sidebar container, breaking the layout and overlapping adjacent page content.

Link to a page where the bug is reproduced in isolation (optional)
https://www.amnesty.org/zh-hans/documents/nws21/005/2010/zh-hans/

Screenshots

Platform:
https://www.whatsmybrowser.org/b/747Q2

Additional context
Issue appears across multiple browsers and devices; likely caused by missing CSS overflow handling or long unbroken text within sidebar items.