A Plex server with 90 days of uptime, a green service status, and perfectly working H. 264 playback can still fail every single EAC3 transcode with a generic "Conversion failed" error. Nothing about Plex changed.
Source: [Dev.to](https://dev.to/futhgar/systemd-tmpfiles-vs-plex-when-tmp-aging-breaks-eac3-transcoding-507)