On iOS (both iPhone and iPad), my searches are being redirected to the login page, which returns "403 Forbidden" after each login. I've verified that the Kagi for Safari extension is installed and that if I navigate to kagi.com it shows that I'm logged in. Everything worked correctly on both of my devices up until this past weekend.
This looks similar to this issue here: https://kagifeedback.org/d/3595-post-login-returns-http-403-forbidden
I tried the workaround suggested there, and it worked once but quickly reverted back to the same problem.
Expected a search request from the Safari address bar to correctly route to the Kagi search page.