Bunch of `Unknown (SRT External)' junk after updating to new Plex Movie Agent

[CostaHT]

I reported this problem in May:

New Plex Media Server movie scanner and agent preview

Here’s the result of my tests: I usually have subtitles in English and Portuguese. The new scanner wasn’t able to recognize the languages: [Screenshot from 2020-05-31 13-26-03] In most cases, even though I have only two subtitle files, the new scanner exhibits random Unknown subtitles. [Screenshot from 2020-05-31 13-29-07] Although my library was set up for Portuguese metadata, only the Covers were being set to Portuguese, all the other data were being set to English. This test was made w…