Randomly getting total failure on manga reader

[skizlock]

I use a VPN to access this site and oddly half the servers don't work with it (Sweden, Romania, Singapore). Actually this app randomly loses function for them, as reconnecting to the same server works.

Errors in console are quite generic, still:

Fetch not ok: chapter 645511 Response { type: "basic", url: "https://mangadex.org/api/?id=645511&server=null&type=chapter", redirected: false, status: 500, ok: false, statusText: "Internal Server Error", headers: Headers, body: ReadableStream, bodyUsed: false }
api.js:51:18

JSON parsing error: SyntaxError: "JSON.parse: unexpected end of data at line 1 column 1 of the JSON data" 
pi.js:58:20

Response status: 500 Internal Server Error 
api.js:67:18

Resource status: undefined 
api.js:68:18

Object { _data: {…}, response: Response, error: Error }
reader-model.js:382:16

 

[skizlock]

This only happens with manga reader, the site itself works completely fine.

 

[skizlock]

The failing request has this URL:

https://mangadex.org/api/?id=645511&server=null&type=chapter

If you want a HAR, I can share it as well.