regex capture with $1 not work in 1.20.0 but in 1.19.10

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with the following rule:

location ~* ^/([/]+)\/? {

root /usr/share/nginx/html/;
index index.html;
try_files $uri $uri/ /$1/index.html;

}

when access with ​http://mytest.server.com/myproject/browser/route/
path /browser/route/ does not exist which expected to to use /myproject/index.html

it works on my macOS with nginx 1.19.10(use /myproject/index.html expected) and not work on the server with nginx 1.20.0(used /index.html with empty capture expected capture "myproject" and use /myproject/index.html)

macOS works

nginx version: nginx/1.19.10
built by clang 13.0.0 (clang-1300.0.29.30)
built with OpenSSL 1.1.1m 14 Dec 2021
TLS SNI support enabled
configure arguments: --prefix=/opt/homebrew/Cellar/nginx-full/1.19.10 --with-http_ssl_module --with-pcre --with-ipv6 --sbin-path=/opt/homebrew/Cellar/nginx-full/1.19.10/bin/nginx --with-cc-opt='-I/opt/homebrew/include -I/opt/homebrew/opt/pcre/include -I/opt/homebrew/opt/openssl@1.1/include' --with-ld-opt='-L/opt/homebrew/lib -L/opt/homebrew/opt/pcre/lib -L/opt/homebrew/opt/openssl@1.1/lib' --conf-path=/opt/homebrew/etc/nginx/nginx.conf --pid-path=/opt/homebrew/var/run/nginx.pid --lock-path=/opt/homebrew/var/run/nginx.lock --http-client-body-temp-path=/opt/homebrew/var/run/nginx/client_body_temp --http-proxy-temp-path=/opt/homebrew/var/run/nginx/proxy_temp --http-fastcgi-temp-path=/opt/homebrew/var/run/nginx/fastcgi_temp --http-uwsgi-temp-path=/opt/homebrew/var/run/nginx/uwsgi_temp --http-scgi-temp-path=/opt/homebrew/var/run/nginx/scgi_temp --http-log-path=/opt/homebrew/var/log/nginx/access.log --error-log-path=/opt/homebrew/var/log/nginx/error.log --with-debug --add-module=/opt/homebrew/share/echo-nginx-module

Darwin 21.2.0 Darwin Kernel Version 21.2.0: Sun Nov 28 20:29:10 PST 2021; root:xnu-8019.61.5~1/RELEASE_ARM64_T8101 arm64 arm64 MacBookPro17,1 Darwin

server env (not working) nginx 1.20.0

nginx version: nginx/1.20.0
built by gcc 7.3.1 20180712 (Red Hat 7.3.1-13) (GCC)
built with OpenSSL 1.1.1g FIPS 21 Apr 2020
TLS SNI support enabled
configure arguments: --prefix=/usr/share/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib64/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --http-client-body-temp-path=/var/lib/nginx/tmp/client_body --http-proxy-temp-path=/var/lib/nginx/tmp/proxy --http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi --http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi --http-scgi-temp-path=/var/lib/nginx/tmp/scgi --pid-path=/run/nginx.pid --lock-path=/run/lock/subsys/nginx --user=nginx --group=nginx --with-compat --with-debug --with-file-aio --with-google_perftools_module --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_degradation_module --with-http_flv_module --with-http_geoip_module=dynamic --with-http_gunzip_module --with-http_gzip_static_module --with-http_image_filter_module=dynamic --with-http_mp4_module --with-http_perl_module=dynamic --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-http_xslt_module=dynamic --with-mail=dynamic --with-mail_ssl_module --with-pcre --with-pcre-jit --with-stream=dynamic --with-stream_ssl_module --with-stream_ssl_preread_module --with-threads --with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic' --with-ld-opt='-Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -Wl,-E'

Linux 5.10.75-79.358.amzn2.x86_64 #1 SMP Thu Nov 4 21:08:30 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

which get capture with empty string (when with-debug)

the following rule works on the server nginx 1.20.0

location ~* ^/(?<prefix>[/]+)\/? {

root /usr/share/nginx/html;
index index.html;
try_files $uri $uri/ /$prefix/index.html;

}

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rule prefix

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rule $1