I'll put in my two cents, since I've been experiencing this problem for about a month.
The retry button really does not work, however for me it never worked, even in the first versions of mangadex 5 years ago, but the page reload always worked.
But since the beginning of May, pushing F5 stopped working almost completely.
What i dug up:
1) First of all, congratulations to all Russian users, mangadex was banned in Russia, again..., [/rant on] because the site administration allows access for unregistered users (checked from incognito with vpn) to view loli hentai (this always triggers moralistic bureaucrats)[/rant off]. Last time it was in summer or autumn, but then somewhere at the beginning of this year the site was unblocked (links due to which the site was banned became 404), now from May 5 it happened again
specific links to banned images here:
https://reestr.rublacklist.net/en/?q=mangadex.org
many probably didn’t even noticed that the site was unbanned and continue to use vpn or proxy browser extensions, but before there were no such problems even when the site was blocked, images were always loaded, albeit slowly
[*i still think the reason is related to the recent website update*]
2) somehow the browser caches an empty\error page and loads it from disk without making a new request to load the image.
pushing retry button does nothing:
3) reloading the page 5-10 times sometimes works and the full reloading of all the images starts, sometimes, even after the FULL reloading, it rolls back to the state when the same images have the same error and were not loaded (I think these are some browser shenanigans) and after another F5 it's fixes again (╯°□°）╯︵ ┻━┻
4) resetting the browser cache works, all images start loading, but then the lottery starts whether the images that were loaded before will be loaded or not.
using data-safe mode changes the url of the images and accordingly they start downloading instead of loading from the disk cache, but in the same way some images may not load and we come to the same result.
it is worth noting that the heavier the images, the more likely it is that they will not load [*looks disapprovingly at groups that make the group credits images larger than all the chapter images combined*]
5) I have not seen a single request to * .mangadex.network, (I remember they were before, I don’t remember before version 5 or after) only uploads.mangadex.org, api and auth, how to FORCE browser to use *.mangadex.network domain?
Using "Port 443 for MangaDex@Home" doing nothing.
If i build node for MD network on my NAS, will that any help for this problem?
6) perhaps the browser does not like the mangadex cert
"Date of issue Friday, February 3, 2023 at 16:11:00
Expiration date Thursday,
May 4, 2023 at 16:10:59"
or maybe it's just a coincidence, because uploads.mangadex cert is valid to july 2023
7)
"Failed to find a valid digest in the 'integrity' attribute for resource 'https://uploads.mangadex.org/data/***/****.png' with computed SHA-256 integrity" error '***' and the
"Unknown error occurred while trying to verify integrity"
in browser log, maybe this will help to understand what's going on
win10, chrome 114.0.5735.90
this is the problem of the proxy extension i'm using working with the mangadex site.
