Chinese simplified subtitles not recognised

Not sure if this is a bug or a problem with the subtitle file itself:

If I try to select the β€œChinese (Simplified)” subtitle in the β€œYoutube subtitle language setting” for this video: Chinese Peppa Pig - πŸ‘žππžπ° π’π‘π¨πžπ¬ ζ–°ιž‹ε­ - πŸ– 𝐂𝐂 𝐒𝐔𝐁𝐒 - YouTube, I’m not getting dictionary lookup or vocabulary highlighting (among other things). When I simply choose β€œChinese” it works… the pity is that this subtitle file contains also pinyin and the english translation which messes everything up.


I think this is probably the same problem I’m seeing here: Hover dictionary is broken "Failed to retreive linguistic data" - #6 by Callum

Neither Chinese (Simplified) or Chinese (Traditional) work for me at the moment on any video I’ve tried. It was fine a couple of weeks ago!

Just tried again with the mentioned chinese peppa pig video: now it works.
Thank you.