If I were a smart man, and that seems to depend on the day of the week, I’d put the services that can swamp the whole system on a separate VM that’s resource constrained so it has its own back pressure built in.

It’s possible you’re seeing a bug, and it’s also possible that The System is Working.

I can tell you that the login link takes me to a form on Safari. When did tech people stop stating which browser they’re using and what quirky tools they have installed?