the error log for php 8.x, reports that there is an error. It looks like this:

2024/08/15 17:55:10 [error] 1753#1753: *836069 FastCGI sent in stderr: “scoreboard: failed to lock (already locked); status: unable to find or access status shared memory” while reading response header from upstream, client: x.x.x.x, server: x.x.com, request: “GET /status?json&full HTTP/1.1”, upstream: “fastcgi://unix:/run/php/php8.3-fpm.sock:”, host: “x.x.com”

for me – it looks like the potential solution is that my main website allows extended timeouts for php scripts. Reducing the script times for the status page, seems to make this better.

I added this:

    location ~ ^/(status|ping)$ {
            proxy_read_timeout 5;
            proxy_send_timeout 5;
            proxy_connect_timeout 5;
            send_timeout 5;
            fastcgi_send_timeout 5;
            fastcgi_read_timeout 5;
            fastcgi_connect_timeout 5;
            client_max_body_size 128K;

            allow all;
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            #fastcgi_index index.php;
            include fastcgi_params;
            fastcgi_pass unix:/run/php/php8.3-fpm.sock;
    }

which seems to have immediately removed the scoreboard issues that I have been battling with – and I have not been able to google a solution for it.