Can't go "back" to previous results site

Steps to reproduce:

open https://kagi.com/search?q=kagifeedback&r=de
click on Search instead for kagifeedback
press backwards in your browser -> it doesn't work (although the previous site is in your browsers history)

Expected behavior:

Debug info:
FF, Mac OS, region: Germany, EU-West

Image/Video:

gesumin Hm isn't back button at the control of browser?

Correct, sorry, I couldn't reproduce this on Ungoogled-Chromium