Certain videos playing as "live"

[skribe]

Again, your server logs, as stated several posts ago, will tell us exactly why Jellyfin is choosing to transcode the files that it is transcoding. We can simply look to see why they are being transcoded, which will tell you what you would need to change to avoid it.

I'm not sure that I understand your question about "resetting" the server or why you think it might be necessary.