[SOLVED] Is it ok that I see 5 processes of Duplicati in Windows Task manager? explains how processes should look (and why) in the maximum normal configuration of Windows service, plus tray icon to add UI.
Starting with the basic 3 (before TrayIcon), what are you seeing for WindowsService processes, and can manual start of the service manage to get them going? Sort alphabetically and watch duplicati processes.
I forget at what level the pause is implemented, but you can see if turning it off helps the service problem.