Found more issues with bangs.
According to https://help.kagi.com/kagi/features/bangs.html#kagi-assistant-bangs
!expert
should be triggering “Expert Assistant. Multiple Kagi searches (and external services) together with the best available AI model for the highest accuracy and comprehensive responses.”, but in fact it just searches on https://www.expert.nl
!code
should be “Code Assistant. Tuned for programming tasks and uses a powerful AI model for programming.”, but in fact it just searches https://www.cnet.com
This seems to be a clash between Kagi’s own bangs and the ones inherited from DDG.