502 Bad gateway errors of 10 Wordpress websites at same time after Cloudlfare update this week

I was only able to find one ticket tied to your email address (for reference it’s 1450919), and it was submitted on Sunday. Tickets are prioritized by plan level and when received, and a couple days for the Free queue isn’t unheard of (depending on the ebb and flow of tickets). I suspect an agent will get back to you pretty soon, but one thing that would be helpful to know is which type of 502 error page you are getting. Can you provide a screenshot? Is it branded Cloudflare or is it mostly white with a small amount of text?