I seem to be encountering an issue where Plex is re-detecting files as Recently Added if I just change the capitalization of the letters within the file name.
Server details:
Windows 10 Pro 64-Bit - Version 1607 (OS Build 14393.477)
Plex Server Version 1.3.1.3102 (Update Channel = Plex Pass)
Media Storage: 3Tb WD Passport USB 3.0 & Seagate 4Tb USB 3.0
Some OS’s have ‘case observing’ but ‘case-insensitive’ behavior. ( you can open the file regardless of capitalization )
Changing the case would actually make it look like a new file because the date/time stamp was different.
This is true on especially true on Linux which is fully case sensitive.