Jellyfin won't render .ASS subtitles

[dje33]

Font attachments in the file : OK
No Font attachments in the file : OK in 10.9.11 / NOK in 10.10.3

.ass with no font attachments

Code:

[Script Info]
ScriptType: v4.00+
Collisions: Normal
PlayResX: 1920
PlayResY: 1080
Timer: 100.0
WrapStyle: 0

[V4+ Styles]
Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
Style: Default,sans-serif,71,&H00FFFFFF,&H00FFFFFF,&H000F0F0F,&H000F0F0F,0,0,0,0,100,100,0,0.00,1,2,3,2,20,20,20,0

[Events]
Format: Layer, Start, End, Style, Actor, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:01.27,0:00:03.89,Default,,0,0,0,,Pourquoi est-on ici ?
Dialogue: 0,0:00:03.98,0:00:05.94,Default,,0,0,0,,Pour sortir.\NEtre ici, c'est sortir.