When using Caddy2 as reverse proxy, rpc & api path has two slash in url

[sulisu]

Version running
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latest september release

Describe the bug
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I can open the web page, but when access api and rpc path, browser make request to //api and //rpc. for example:

wss://host:port/base1/base2//rpc/ws
https://host:port/base1/base2//api/v1/cookies
https://host:port/base1/base2//api/v1/version

and server return 404 error. It works if I remove addition slash and manually access the url in browser. I can get response such as "{"rpcVersion":"3.2.1","ytdlpVersion":"2024.08.06\n"}"

Caddy2 as reverse proxy, related config in caddy2 yaml file

redir /base1/base2 /base1/base2/ 301

        route /base1/base2/* {
                uri strip_prefix /base1/base2
                reverse_proxy 127.0.0.1:3033 {
                }
        }

in yt-dlp-web-ui web settings

Is behind a reverse proxy : checked

urlbase: base1/base2

And web ui gives some error message such as:
"Error while connecting to RPC server (host:port/base1/base2/)"

To Reproduce
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4. See error

Expected behavior
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