Some pages have been frequently unable to load for me as well since a few days and I have no clue what is going on nor have I see another support post on it.
Aand just now I read another post that fixed it for me (I hadn't checked since yesterday):
Turn this shit off and try again. MD team are dumbasses and released an alpha solution that fucks more people than helps.
https://mangadex.org/md_at_home/options
I'm getting 502s all over the site, but surely that new feature is only for serving pages themselves, not the entire website?
Regardless, turning it off didn't help with 502s.
Big question. Are you idiots using the Legacy reader? Because that DOES NOT WORK with the MD@ Home. Its going to be killed off in the very near future. And you shouldnt complain about any problems involving Legacy anyway. It has been unsupported for months now.