Speedreader shows json instead of article text

[rillian]

Description

Visiting https://matomo.org/blog/2022/01/google-analytics-gdpr-violation/ with Speedreader enabled shows some random computer code instead of the article text.

Steps to Reproduce

1. Enable Speedreader
2. Visit https://matomo.org/blog/2022/01/google-analytics-gdpr-violation/

Actual result:

Article title banner looks ok, but instead of an article body, the page shows

{"cookieName":"wBounce","isAggressive":false,"isSitewide":true,"hesitation":"500",...

Expected result:

Article body should be displayed in text.

Reproduces how often:

Always.

Brave version (brave://version info)

Brave 1.35.87 Chromium: 97.0.4692.71

Version/Channel Information:

• Can you reproduce this issue with the current release?
• Can you reproduce this issue with the beta channel?
• Can you reproduce this issue with the nightly channel?

Miscellaneous Information:

The displayed text is json, which is part of the page body, as text content inside of <div display="hidden">. The real text is inside section tags, but there's no enclosing article tag.

We don't necessarily want to ignore hidden divs, but it's odd that the simplifier misses the main body text entirely.