Yes, this is probably a bug of WebOS and LG do not take any action. Furthermore, there is a problem when reading UTF-8 subtitles. Appear strange symbols sometimes.
Personally, I always convert subtitles in ANSI and have no problem with their transcripts.
What do you use to convert the subtitle to ANSI ? Does this make the strange symbols disappear, while viewing a movie with subs?
LB731 webOS - problem with subtitle encoding and mkv files
in LG webOS Smart TV Questions
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What do you use to convert the subtitle to ANSI ? Does this make the strange symbols disappear, while viewing a movie with subs?