@wizardfromoz - 'member when I first wrote that page and you indicated that you hoped it made a difference? Well, it has been read thousands of times and is now the #1 search result at Google for 'ask a good support question'!
The amusing thing is I have no idea what I'm doing when it comes to SEO. I use a plugin, follow the directions, and generally write to a formula. Sometimes, Google REALLY likes my articles - but ranking #1 for this is amazing!
I just saw bad gateway errors on three browser tabs on 1 January 2023 at 10:22 AM PST = 18:22 UTC.
How I saw them:
I clicked the "Bell" notification icon and "Command-clicked" the three items at the top of the dropdown menu to open them into separate tabs in the Safari browser on Mac. Those were the pages with bad gateway errors.
I clicked the reload button as soon as I noticed, and each page loaded correctly.