Here's a little suggestion, using the new CustomCommand I've provided, use that to convert the file to mpeg4 format AND also burn the subtitles into it while doing it. Now IMPRTANTLY keep the format as TS so that MCEBuddy does not bug out post
your CustomCommand.
Keep all else the same.
AND use a profile like MP4 Unprocessed (which does not recode since you've already encoded to MP4).(otherwise it will end up reconverting mpeg4 to mpeg4)