Seeing as how fresh this thread and reports are, I'm guessing a firewall provider recently added Kagi to an AI category.
I personally ran into this when I got into work this morning. Kagi is now blocked on my company's corporate network under "AI Category".
On the one hand, I fully understand corporate IT needing to restrict AI use to only vetted vendors.
On the other hand, this means that Kagi is now under a blanket block by my corporate IT because it has an AI offering that isn't clearly separable from the non AI offerings.