Codec issue? Some videos playing without sound.

[DaedalusBLN]

OS: Windows 10 x64 build 1903

This is a bug I also had in some android apps, where some links played back without sound.
What solved the issue was installing codecs for the player the app used (MX Player).
But as this app has an integrated player I don't know what to do to fix the issue.

An example: The Beach Bum (I hope you get served the same source to replicate the bug).

Also Cast info is not being displayed, even though TMDB is having issues at the moment.