SS IPTV

My playlist starts with:

#EXTM3U x-tvg-url="http://hst.tivi.bg/pl/index.php?some-parameters"

However the x-tvg-url does not appear to be loaded at all - there is no mention of it in the apache's log file. The last request I see is the one for the playlist (the same url, different parameters), but there is no second request for the tv guide at all (no OPTIONS, GET, HEAD or whatever it may be).

Here is the response from the playlist url:

HTTP/1.1 200 OK
Date: Tue, 01 May 2018 09:18:20 GMT
Server: Apache
X-Powered-By: PHP/5.4.7
Access-Control-Allow-Origin: *
Content-Disposition: attachment; filename="playlist.m3u"
Accept-Ranges: none
Access-Control-Allow-Methods: GET, POST, OPTIONS, HEAD
Access-Control-Allow-Headers: Range
Access-Control-Expose-Headers: Accept-Ranges, Content-Encoding, Content-Length, Content-Range
Transfer-Encoding: chunked
Content-Type: audio/mpegurl

#EXTM3U x-tvg-url="http://hst.tivi.bg/pl/index.php?...."
#EXTINF:-1 tvg-id="701" tvg-name="701" group-title="Low bandwidth" catchup="default" catchup-source="..." catchup-days="7",БНТ1 LQ
#EXTSIZE: medium
http://hst.tivi.bg/...

Note that I'm testing it under Android 7 (NOT Android TV).

The playlist itself loads as expected, the streams are working.