Segmented subtitles: what impact for the player?

Hello guys,


Our live streams segment all subtitles regarding segment size, which leads to sth like this:


WEBVTT

X-TIMESTAMP-MAP=MPEGTS:2767335200,LOCAL:00:00:00.000

00:00:00.000 --> 00:00:00.000 Un poulet nourri au maïs tombe malade.

00:00:00.000 --> 00:00:02.000 Les premiers colons aussi ont eu la pellagre,

00:00:02.000 --> 00:00:02.520 Les premiers colons aussi ont eu la pellagre,

00:00:02.760 --> 00:00:04.000 une carence en vitamine PP,

00:00:04.000 --> 00:00:04.280 une carence en vitamine PP,


As stated in Pantos: https://tools.ietf.org/html/draft-pantos-http-live-streaming-22#page-8

Each WebVTT Segment MUST contain all subtitle cues that are intended to be displayed during the period indicated by the segment EXTINF duration. The start time offset and end time offset of each cue MUST indicate the total display time for that cue, even if part of the cue time range is outside the Segment period. A WebVTT Segment MAY contain no cues; this indicates that no subtitles are to be displayed during that period.

What can happen on player side (iOS/tvOS) if we are not compliant with that? Have you ever heard it can make the player crash, stall or flicker?


Thank you.