Sorry - I appreciate it's very annoying - it is for me too, but I'm struggling to diagnose this one as nothing is being dumped to log files.
I'll keep working on it though.
Thanks.
I direct all NSC error emails to an email account I'd forgotten how to access.
The site was failing with too many connections to the DB which I don't believe has ever happened before. I'll speak to the hosts.
I've had a couple today - lasted a minute or so and that was it.
I tend to put those down as "one of those things" but I'll check logs etc later to make sure.