I followed the instructions from this post:
I disable all the scanning functions and I restarted the Synology NAS because even when I shut down plex app the NAS was running Plex scan in the background.
I have enabled the scanning functions on both servers and I would like you to look at them again. The Server 1 gets tuck scanning [Castlevania]
(#!/server/21e7a714e205258ffab0533c641e61577a56896d/details?key=%2Flibrary%2Fmetadata%2F11319)
The Server 2 has the scanning enabled but I have not added any new media so it is not running scan now. Server 1 - Plex Media Server Logs_2019-06-10_12-25-31.zip (4.0 MB) Server 2 - Plex Media Server Logs_2019-06-10_11-25-59.zip (4.5 MB)
I just manually asked the Server 2 to start scanning. This has made the Plex app to start scanning and it wont stop scanning the same folder. Here is the log.
Server 2 -Plex Media Server Logs_2019-06-10_11-47-47.zip (4.5 MB)
