LOCK method got 405 not allowed

[mmqmzk]

OS ubuntu 19.10

nginx version: nginx/1.17.5
built by gcc 8.3.0 (Ubuntu 8.3.0-6ubuntu1)
built with OpenSSL 1.1.1b  26 Feb 2019 (running with OpenSSL 1.1.1c  28 May 2019)
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --http-client-body-temp-path=/var/cache/nginx/client_temp --http-proxy-temp-path=/var/cache/nginx/proxy_temp --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp --http-scgi-temp-path=/var/cache/nginx/scgi_temp --user=nginx --group=nginx --with-compat --with-file-aio --with-threads --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_flv_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_mp4_module --with-http_random_index_module --with-http_realip_module --with-http_secure_link_module --with-http_slice_module --with-http_ssl_module --with-http_stub_status_module --with-http_sub_module --with-http_v2_module --with-mail --with-mail_ssl_module --with-stream --with-stream_realip_module --with-stream_ssl_module --with-stream_ssl_preread_module --with-cc-opt='-g -O2 -fdebug-prefix-map=/data/builder/debuild/nginx-1.17.5/debian/debuild-base/nginx-1.17.5=. -fstack-protector-strong -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fPIC' --with-ld-opt='-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,--as-needed -pie'

nginx conf

  location /webdav {
    alias /data/;
    autoindex on;

    set $dest $http_destination;
    if (-d $request_filename) {
      rewrite ^(.*[^/])$ $1/;
      set $dest $dest/;
    }
    if ($request_method ~ (MOVE|COPY)) {
      add_header 'Destination: $dest' always;
    }

    if ($request_method ~ MKCOL) {
      rewrite ^(.*[^/])$ $1/ last;
    }

    dav_methods PUT DELETE MKCOL COPY MOVE;
    dav_ext_methods PROPFIND OPTIONS LOCK UNLOCK;
    dav_access user:rw group:rw all:r;
    create_full_put_path  on;

    auth_basic "Restricted access";
    auth_basic_user_file /etc/nginx/htpasswd.conf;

    client_body_temp_path /tmp/nginx;
    client_max_body_size 0;
    client_body_timeout 36000s;
  }

I compiled the dav_ext module myself.
sudo nginx -t shows conf is ok and nginx also runs ok, other methods like PROPFIND is ok too, but still get 405 not allowed for LOCK method.

access.log

[07/Nov/2019:15:39:35 +0800] "LOCK /webdav/Download/client_id.json HTTP/2.0" 405 157 "-" "curl/7.65.3" "-"

No other error log, did I miss something?