I've been getting a lot of 502 Bad Gateway errors.
While I was compiling a post, I think the auto-save triggered one, and it had a box that covered the left half of the browser. I was able to post just fine.
However, navigating to forums, or posts through My Bookmarks is giving a few 502 Bad Gateway errors. Hitting back or refreshing makes it go away. I cannot reliably reproduce it.
This is on Win 10 desktop with Chrome.