Looks like since about an hour ago, lemmy.world has been serving read ECONNRESET responses at a high frequency. Not sure if this is a real issue, but I'm not seeing anything on other instances I'm tracking.
edit: I changed the check frequency and that seems to have "resolved" the errors on my end. Probably a better indication of actual uptime than before, but maybe not as representative of the end-user browsing experience.
What site/service is that?