Okusama ga Seito Kaichou! images returns a 403 Forbidden error for many chapters

[braiam]

Is 2 years considered a old chapter that would have this problem? I'm trying to read Okusama ga Seito Kaichou! first chapter by MAL, but I'm met with a 403 error for the image

 

[MavB_Ver]

No problem here. Try changing image servers?

 

[braiam]

Changed images server, still uses the same domain and ip address s5.mangadex.org for the reader https://www.mangadex.org/chapter/704217/1 . If I try the direct url (https://s5.mangadex.org/data/f9eaa700753272e35520834ac206e038/K1.jpg) it curiously works. I really don't get it.

These are the headers for the image url that works:

GET /data/f9eaa700753272e35520834ac206e038/K1.jpg?t=1581367099564 HTTP/1.1
Host: s5.mangadex.org
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:72.0) Gecko/20100101 Firefox/72.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-CA,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate, br
Connection: keep-alive
Cookie: __ddg1=[redacted]; mangadex_session=[redacted]; mangadex_rememberme_token=[redacted]
Upgrade-Insecure-Requests: 1
DNT: 1
Pragma: no-cache
Cache-Control: no-cache

This is the one that gets generated by the ajax request from the reader:

GET /data/f9eaa700753272e35520834ac206e038/K1.jpg HTTP/1.1
Host: s5.mangadex.org
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:72.0) Gecko/20100101 Firefox/72.0
Accept: image/webp,*/*
Accept-Language: en-CA,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate, br
Referer: https://www.mangadex.org/chapter/704217/1
Connection: keep-alive
Cookie: __ddg1=[redacted]; mangadex_session=[redacted]; mangadex_rememberme_token=[redacted]
DNT: 1
Pragma: no-cache
Cache-Control: no-cache

The only differences are in the Accept and Referer headers. Both hit the same path and ip.