Quick overview of my situation:
I am syncing between 3 different Synology NAS's. There are 2 DS1513+ units and one DS1815+
Each device has two folders it is required to sync, the 1815+ and one of the 1513+ sync instances work perfectly fine, but one of the devices shows one of the two folders as "Service files missing".
I have tried re adding the folder and reinstalling Sync, but every time the result is the same, the service files go missing. I have noticed every time I attempt to replace the missing files the IgnoreList and StreamsList files from inside the .sync folder go missing after a few minutes.
I am absolutely confused at what is going on and any help here is greatly appreciated.