User (extended) activity page is broken in UI

Summary

User (extended) activity page is broken in UI.

Steps to reproduce

1. Visit https://gitlab.com/users/Peneheals/activity to wait for to complete full page load.

Example Project

What is the current bug behavior?

https://gitlab.com/users/Peneheals/activity?limit=20&offset=60 looks having broken in .html in its JSON response.

What is the expected correct behavior?

All hr elements(horizontal rules) should be aligned.

Relevant logs and/or screenshots

Output of checks

This bug happens on GitLab.com (15.4-pre).