App Platform + Nginx + php-fpm issue, request hangs

I created a web service resource on App Platform, it’s built from a custom Dockerfile. The App works well (most of the time) but sometimes (randomly), requesting same API endpoint hangs and take a lot of time to complete. The same docker container doesn’t have this issue running locally, I think this problem i related with the App platform Load Balancer and some nginx configuration. Are there any particular configuration to made if work? Thanks

These are my configs:

/etc/nginx/nginx.conf:

# user www-data;
pid /tmp/nginx.pid;
worker_processes 1;

events {
    worker_connections 1024;
}

http {
    charset utf-8;

    # copies data between one FD and other from within the kernel
    # faster than read() + write()
    sendfile on;

    # send headers in one piece, it is better than sending them one by one
    tcp_nopush on;

    # don't buffer data sent, good for small data bursts in real time
    tcp_nodelay on;

    # allow the server to close connection on non responding client, this will free up memory
    reset_timedout_connection on;

    # hide server info for security
    server_tokens off;

    log_not_found off;
    types_hash_max_size 2048;

    client_body_buffer_size 16K;
    client_header_buffer_size 4k;
    client_max_body_size 20M;
    large_client_header_buffers 4 16k;

    client_body_timeout 12;
    client_header_timeout 12;
    keepalive_timeout 15;
    send_timeout 10;

    # cache information about FDs, frequently accessed files
    open_file_cache max=200000 inactive=20s;
    open_file_cache_valid 60s;
    open_file_cache_min_uses 5;
    open_file_cache_errors off;

    # MIME
    include mime.types;
    default_type application/octet-stream;

    # enhancment
    # Replace loadbalancer IP(real-ip) with actual client IP.
    set_real_ip_from  0.0.0.0/0;
    real_ip_header    X-Forwarded-For;
    real_ip_recursive on;

    # load configs
    include /etc/nginx/conf.d/*.conf;
}

/etc/nginx/conf.d/app.conf:

server {
    listen 8080;
    server_name app;
    root /var/www/html/public;

    autoindex on;
    index index.php;

    charset utf-8;

    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }

    location ~ \.php$ {
        try_files $uri =404;
        include fastcgi_params;
        fastcgi_index index.php;
        fastcgi_intercept_errors on;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_pass unix:/var/run/php-fpm.sock;
    }

    # nginx status page
    location /status-nginx {
        stub_status on;
        access_log  off;
    }

    # fpm status page and ping page
    location ~ ^/(status|ping)$ {
        access_log off;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_pass unix:/var/run/php-fpm.sock;
    }

    location ~ /\.ht {
        deny all;
    }
}

/usr/local/etc/php-fpm.d/www.conf:

[www]
user = www-data
group = www-data
listen = /var/run/php-fpm.sock
listen.owner = www-data
listen.group = www-data
pm = ondemand
pm.max_children = 9
pm.start_servers = 2
pm.min_spare_servers = 2
pm.max_spare_servers = 6
pm.process_idle_timeout = 60s
pm.max_requests = 5
request_terminate_timeout = 60s
request_slowlog_timeout = 30s
ping.path = /ping
pm.status_path = /status
slowlog = /proc/self/fd/2
catch_workers_output = yes