Can not handle multiple subtitles

[LienLotus]

In the m3u8 file:
Total subtitles tracks are 2 tracks
But using m3u8-parser, total subtitles track is only 1 track

 let parser = new m3u8Parser.Parser();
 parser.push(response.body);
 text_tracks = parser.manifest.mediaGroups.SUBTITLES;

Note: response.body is the content of the m3u8 file (in the attachment)
test.txt
Env: Ubuntu 18.04, m3u8-parser version 4.4.0

[LienLotus]

Same issue with multiple audio