Cloudflare Pages Route matching problem

This is where the problem appears: https://owo.pages.dev/loading.otp.html
When I visit the html page like this, it will be automatically redirected to https://owo.pages.dev/loading.otp
However, after redirecting it returns a status code of 404.
I think the route matching only works when the html file has no sub-suffix like this: loading.html, and when it comes like loading.otp.html, test.2.html , the page after redirecting will return 404.
I’ll appreciate it if there’s any solution to this problem…
(btw, I’m not good in English, I think I expressed the problem I’ve met correctly :joy:)