forced subtitles in mkv not shown automatically

[MarkFromGR]

Hello,
I'm using XMedia Recode (V 3.5.7.5) for converting movie-files to mkv265. Unfortunalty I got a problem with converting forced subtitiles which should be shown automtically afterwards. Altough I've select "forced" and "default audio" within the subtitle-tab in XMEIDA, the subtitles are not shown automatically and have to select manually within the movie-player. Did anybody have an idea or the same effect? How can I fix it?
Thanks in advance! Mark

[johns0]

Need some more info,are these video being played on windows or through a tv media player or xbox or other output device?

[MarkFromGR]

Being played on Windows via VLC and LibreELEC on TV

[netmask56]

What does a MediaInfo file say about your MKV file, is forced indicated? personally I would use MKVToolNix to make the MKV file or MakeMKV first followed by MKVToolNix to do any processing like setting defaults and force or adding or removing tracks.