--user_agent_suffix not working

[T1t4n25]

./lightpanda serve --host 127.0.0.2 --port 9222 --user_agent_suffix "(X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36"

I want to change the user agent by any means, I tried playwright python, puppeteer js, and I can't find any online guides or clarification, I tried digging into the codebase with no luck, and the only argument that gives a hint doesn't work