There is a bug in MediaWiki. This bug is encountered in Wikipedia.
In a page, I edit a section.
I press "Show changes".
I see a list of differences. In this list, there are :
- my changes,
- but also the undoing of all the changes that people have made in other sections.
The presence of 1. is correct.
The presence of 2. is incorrect.
Thank you for correcting this bug.