When initiating an Orion search via Spotlight, the search is made using DuckDuckGo even though my default search engine is Kagi. Orion is also set as my default browser. See the below screen recording and settings screenshots.
Orion Settings

System Settings

I have isolated the bug, although I'm not sure if Orion or Apple are at fault here. It seems to interrelate with Safari and its Kagi Extension (for reference, I have not tried to uninstall/reinstall the extension). The search redirect away from Kagi Search on Orion happens when Safari's default search engine is set to anything other than Google. See the below screen recording for reference.
macOS 15.5
Orion 0.99.135-beta (WebKit 622.1.15.19.2)