--retry ignores --continue-at for the latest file #18035

I did this

I tried
curl -y 30 -Y 30 --connect-timeout 10 --retry 10 -C - -x socks5h://localhost:9050 -e https://somesite.com/ -LORf https://somesite.com/[1-10].webp

Downloading from this site is unstable. It often downloads 10-20k out of ~100k and gets stuck, thus it needs too be interrupted and resumed.

But when --retry command is used, when the transfer speed is too slow, the size of partially downloaded file is reset to 0 and downloading restarts from the start, ignoring -C -.

Same for adding --no-remove-on-error:
curl --no-remove-on-error -y 30 -Y 30 --connect-timeout 10 --retry 10 -C - -x socks5h://localhost:9050 -e https://somesite.com/ -LORf https://somesite.com/images/[1-10].webp --no-remove-on-error

I expected the following

If connection times out, curl --retry -O -C - --speed-limit 10 ... should retain the partially downloaded file, the same way curl -O -C - --speed-limit 10 ... does

curl/libcurl version

curl 8.14.1 (x86_64-pc-linux-gnu) libcurl/8.14.1 OpenSSL/3.3.3 zlib/1.3.1 brotli/1.1.0 zstd/1.5.7 c-ares/1.34.4 libidn2/2.3.8 libpsl/0.21.5 libssh2/1.11.1 nghttp2/1.65.0 nghttp3/1.8.0 librtmp/2.3 OpenLDAP/2.6.8
Release-Date: 2025-06-04
Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns ldap ldaps mqtt pop3 pop3s rtmp rtsp scp sftp smb smbs smtp smtps telnet tftp ws wss
Features: alt-svc AsynchDNS brotli GSS-API HSTS HTTP2 HTTP3 HTTPS-proxy HTTPSRR IDN IPv6 Kerberos Largefile libz NTLM PSL SPNEGO SSL threadsafe TLS-SRP UnixSockets zstd

operating system

Gentoo Linux
Linux jet 5.15.32-gentoo-r1 #14 SMP PREEMPT Sun Apr 20 22:35:48 MSK 2025 x86_64 AMD FX(tm)-8300 Eight-Core Processor AuthenticAMD GNU/Linux