Movie files download but with no file extension

[crowek123]

Hello,

Around the beginning of this month, my movie downloads started downloading with no file extension. I only noticed when I was looking for movies I know had finished downloading, but were not populating in Plex. The movie folder was present, and when I checked inside, there was a file with no extension, but the size was obviously a movie. I manually changed the file type to .avi, and it worked and Plex discovered it. My question, is why is this all of a sudden happening? I haven't found anything on this topic. Nothing's changed on my computer, and I'm looking for some advice on what to possibly look for before doing a roll-back.

Any help will be apprecited.

I didn't find the right solution from the Internet.

References:
https://forums.sabnzbd.org/viewtopic.php?t=21781
Product Video Production Service

Thank you.