Subtitles are missing...

[PeterRRadkov]

Hi!
I'm trying to display subtitles using this plugin. My m3u8 data is (for instance):
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="Bulgarian",FORCED=NO,AUTOSELECT=YES,URI="subtitlelist_lbul_w1710032839.m3u8",LANGUAGE="bul"
#EXT-X-STREAM-INF:BANDWIDTH=3874784,CODECS="avc1.640029,mp4a.40.2",RESOLUTION=1280x688,SUBTITLES="subs"
chunklist_w1710032839.m3u8

But the player does not display any subtitles.

The main file works fine.

Other player (Clappr) works ok with this m3u8 -- what could be the issue?

I'm using Strobe player.

Thanks.