Glitch while going backward/forward in history

Summary

When in Ladybird, when I click on the back/forward button, for a brief moment, I can see the previous/next page without its styles.

Operating system

macOS

Steps to reproduce

1. navigate to https://github.com/LadybirdBrowser/ladybird/commits/master/
2. click on pull requests
3. click on the back browser button
4. click on the forward browser button

Expected behavior

The previous/next page should appear with the proper CSS and should not be visible without its styles.

Actual behavior

The previous/next page is visible without its styles for a brief moment.

URL for a reduced test case

https://github.com/LadybirdBrowser/ladybird/commits/master/

HTML/SVG/etc. source for a reduced test case

N/A

Log output and (if possible) backtrace

N/A

Screenshots or screen recordings

https://github.com/user-attachments/assets/7f318bb1-08ef-4a2d-bc6c-aa1f50beb15f

Build flags or config settings

No response