Vlad Thanks for your answer.
- We're accessing kagi from france
- Our ISP is OVH
- We don't use VPN, it's just a straight connection, nothing weird.
I've just tried on mobile, and it seems to be working fine. The only difference between my mobile and our computers is that I don't use the same DNS resolver. I really don't see why it could cause any issue, but I've just changed the DNS resolver on my computer. I'll update this post in a few hours. I don't have a lot of hope, but we'll see!
Ok I was wrong, I tried with my mobile, and it works with the 4G connexion, but not in wifi. If I try on wifi, I have the same issue (and without any surprise, changing DNS resolver does nothing).
So now I know the issue resides in our home internet connection. But I can't understand why only kagi has this issue.
EDIT: Disabling ipv6 seems to have resolved the issue. I have no idea if there's a problem with the way my ISP does ipv6, or if kagi does something weird. I'm just glad it works now. If you need further tests, I can help.