Hello dear Nginx users, being amateur user I wanted to ask You for your help.

My Nginx configuration is properly serving a webpage when visiting:
server.my.name
my.name
my.name/rooms
my.name/room/abc
my.name/r/abc/

but not when i visit:
my.name/r/abc
(note that same path works when it has trailing slash)

without slash, it redirects to http://127.3.2.1:4242/r/abc/

my configuration file is:

# cat /etc/nginx/nginx.conf
[quote]
#user nobody;
worker_processes 1;

#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;

events {
worker_connections 1024;
}

http {
access_log off;
access_log /var/log/nginx/access.log;
#access_log logs/access.log main;
error_log on;
#log_format main '$remote_addr - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"';
include mime.types;
default_type application/octet-stream;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
# include /etc/nginx/sites-enabled/*;

server {
server_name 127.0.0.1 server.my.name;
listen 80;
listen [::]:80;
listen 443 ssl; # managed by Certbot
listen [::]:443 ssl;
ssl_certificate /etc/letsencrypt/live/my.name/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/my.name/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

location / {
root /var/www/html;
}

index index-server-var-www.html index.htm index.php
try_files $uri $uri/ =404;

location ~ /\.ht {
deny all;
}

location = /favicon.ico {
log_not_found off;
access_log off;
}
}

server {
server_name https my.name www.my.name;
client_max_body_size 10M;
location /static/ {
autoindex off;
root /usr/lib/python3/dist-packages/sogs;
# try_files $uri /404.html;
# error_page 404 =200 /404.html;
}
location = /404.html {
root /var/lib/session-open-group-server;
}
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_pass http://127.3.2.1:4242$request_uri;
# try_files $uri $uri/ =404;
# if ($request_uri = "?public_key=") { return 301 /; }
}
listen 80;
listen [::]:80;
listen 443 ssl; # managed by Certbot
listen [::]:443 ssl;
ssl_certificate /etc/letsencrypt/live/my.name/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/my.name/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

# error_page 404 /404.html;
# error_page 404 =200 /404.html;
# try_files $uri /404.html;

}
}[/quote]

Since i think that i am not linking to any other .conf files, issue must be in above file, but where to correct it please?