[Артист]

Всё дело в том, что раньше всё работало, а теперь перестало...

Ну вот, в оригинале нет ничего про кодировку:

General:
Request URL: http://домен/страница.php
Request Method: GET
Status Code: 200 OK
Remote Address: айпи:порт
Referrer Policy: no-referrer-when-downgrade

Response Headers:

HTTP/1.1 200 OK
Server: QRATOR
Date: Wed, 10 Jan 2018 20:25:25 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: keep-alive
Keep-Alive: timeout=15
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Encoding: gzip
Vary: Accept-Encoding

Request Headers:
GET /roulette.php HTTP/1.1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip, deflate
Accept-Language: ru-RU,ru;q=0.9,en-US;q=0.8,en;q=0.7
Connection: keep-alive
Cookie: _ym_uid=187995685451; ...Ну и там дальше...
Host: Домен
Referer: http://домен/страница.php
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36