Changing subtitle language not working when Prefer dub stream is set

[k2helix]

Since version 5.3.2, when watching any episode with the option "Prefer dub stream" set, if the subtitle language is changed subtitles won't appear unless refreshing the episode (for instance changing quality or going to mirror/main).

This did not happen prior to updating. For instance, you could be watching an episode with dub audio without subtitles, then turn on subtitles for a moment because of a word you didn't understand, and turn them off again without any need to refresh the episode.