I’m having this issue as well with similar setup (Rclone + Plex on VPS). I’m not sure what is going on with the .inProgress folder on my remote location (Google Drive). Plex cannot read the final output file and the optimized versions therefore doesnt work.
Is it possible to change the temp / inProgress folder location? It would make sense optimization process would use the “Transcoder temporary directory” and then on conversion completion move the output file to final target location.
Everyone please Vote for this Feature Suggestion, perhaps it gets implemented at some point…