A lot of 502 errors on my site

It seems that your domain is :grey: grey clouded, meaning traffic is hitting the origin servers directly. I am confused about the fact that your hosting provider would blame Cloudflare. Cloudflare doesn’t proxy traffic when it is :grey:

Your site currently loads very slowly. If you just changed from :orange: to :grey: and you have seen 502 Cloudflare branded errors, then that just might be the reason.

https://support.cloudflare.com/hc/en-us/articles/218378978-What-should-I-do-after-seeing-a-502-or-504-gateway-error-on-my-site-