Music scanner scans entire music collection when new content added

Thanks @leelynds - The assertion by the development team is that scanning is now much faster than before and should be able to handle the extra activities

What I can see from your log is that the scan for adding the album of two items completed at 17:14:05. Does scanning continue beyond that time. It started at 17:13:39

Jan 28, 2020 17:14:03.960 [7148] DEBUG - Activity: updated activity 39865798-594b-4877-bd3b-72be73198ea7 - completed 100.0% - Scanning Music & Videos

I will now look at the logs from recent and old versions of Plex Media Server provided by @Ambrodog