Using CloudDrive folder, 'fileLastModified' is always different with 'lastModifiedDate' in several library scans

[yotsubar]

Steps to reproduce

1. Mount a cloud drive using CloudDrive, docker version
2. A library which root folder is the cloud drive mount point, and Force directory modified time enabled
3. Scan this library(not deep) several times.
4. Each time komga will update series and hash all books. Logs show that komga found the fileLastModified is different with lastModifiedDate

Expected behavior

lastModifiedDate should be equal to fileLastModified ?
I found they were different in every scan, and then komga analyse all books.
Should they be equal ? Or any other ways to avoid refreshing the series not changed?

Actual behavior

'fileLastModified' is different with 'lastModifiedDate' , and komga always refresh all series and hash all books

Logs

2026-04-06T19:49:14.628+08:00  INFO 1 --- [http-nio-25600-exec-83] o.g.komga.application.tasks.TaskEmitter  : Sending task: ScanLibrary(libraryId='0MTQGVHEY85DE', scanDeep='false', priority='8')
2026-04-06T19:49:14.637+08:00  INFO 1 --- [taskProcessor-10] o.g.komga.application.tasks.TaskHandler  : Executing task: ScanLibrary(libraryId='0MTQGVHEY85DE', scanDeep='false', priority='8')
2026-04-06T19:49:14.642+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Scan root folder for library: Library(name=moxmoe, root=file:/manga/, importComicInfoBook=true, importComicInfoSeries=true, importComicInfoCollection=true, importComicInfoRea
dList=true, importComicInfoSeriesAppendVolume=true, importEpubBook=true, importEpubSeries=true, importMylarSeries=true, importLocalArtwork=true, importBarcodeIsbn=false, scanForceModifiedTime=true, scanOnStartup=false, scanInterval=DISABLED, scanCbx=true, scanPdf=true, scanEpub
=true, scanDirectoryExclusions=[#recycle, @Recycle, @eaDir], repairExtensions=false, convertToCbz=false, emptyTrashAfterScan=true, seriesCover=FIRST, hashFiles=true, hashPages=false, hashKoreader=false, analyzeDimensions=true, oneshotsDirectory=null, unavailableDate=null, id=0M
TQGVHEY85DE, createdDate=2025-09-02T19:22:51, lastModifiedDate=2026-04-05T15:29:57.645)
2026-04-06T19:49:14.642+08:00  INFO 1 --- [taskProcessor-10] o.g.k.domain.service.FileSystemScanner   : Scanning folder: /manga
2026-04-06T19:49:14.642+08:00  INFO 1 --- [taskProcessor-10] o.g.k.domain.service.FileSystemScanner   : Scan for extensions: [cbz, zip, cbr, rar, pdf, epub]
2026-04-06T19:49:14.643+08:00  INFO 1 --- [taskProcessor-10] o.g.k.domain.service.FileSystemScanner   : Excluded directory patterns: [#recycle, @Recycle, @eaDir]
2026-04-06T19:49:14.643+08:00  INFO 1 --- [taskProcessor-10] o.g.k.domain.service.FileSystemScanner   : Force directory modified time: true
2026-04-06T19:49:45.647+08:00  WARN 1 --- [http-nio-25600-exec-60] o.s.web.servlet.PageNotFound             : No mapping for GET /sw.js
2026-04-06T19:50:04.005+08:00  INFO 1 --- [taskProcessor-10] o.g.k.domain.service.FileSystemScanner   : Scanned 500 series, 8657 books, and 56 sidecars in 49.357514719s
2026-04-06T19:50:04.136+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Series changed on disk, updating: Series(name=AREA51, url=file:/manga/AREA51/, fileLastModified=2026-03-31T21:08:13, id=0MWBS73F81326, libraryId=0MTQGVHEY85DE, bookCount=15, deletedDate=null, oneshot=false, createdDate=2025-09-07T21:09:32, lastModifiedDate=2026-04-05T15:41:58.526)
2026-04-06T19:50:10.814+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Book changed on disk, but still has the same hash, no need to reset media status: Book(name=AREA51 - 第01卷 - 久正人, url=file:/manga/AREA51/AREA51%20-%20%E7%AC%AC01%E5%8D%B7%20-%20%E4%B9%85%E6%AD%A3%E4%BA%BA.epub, fileLastModified=2026-03-31T21:08:13, fileSize=59658240, fileHash=14464ea4bff19a7d74dc4983f94ff85d, fileHashKoreader=, number=1, id=0MWBS73F8132H, seriesId=0MWBS73F81326, libraryId=0MTQGVHEY85DE, deletedDate=null, oneshot=false, createdDate=2025-09-07T21:09:32, lastModifiedDate=2026-04-06T09:24:54.111)
2026-04-06T19:50:10.817+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Adding new books: []
2026-04-06T19:50:10.818+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Try to restore books: []
2026-04-06T19:50:10.835+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Series changed on disk, updating: Series(name=Touch, url=file:/manga/Touch/, fileLastModified=2026-03-31T23:02:23, id=0MWBS73J810GV, libraryId=0MTQGVHEY85DE, bookCount=26, deletedDate=null, oneshot=false, createdDate=2025-09-07T21:09:32, lastModifiedDate=2026-04-05T16:50:12.575)
2026-04-06T19:50:17.884+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Book changed on disk, but still has the same hash, no need to reset media status: Book(name=Touch - 第18卷 - 安達充, url=file:/manga/Touch/Touch%20-%20%E7%AC%AC18%E5%8D%B7%20-%20%E5%AE%89%E9%81%94%E5%85%85.epub, fileLastModified=2026-03-31T23:02:23, fileSize=80636149, fileHash=86cb9628c8ad71c002b24fc9b7b597fe, fileHashKoreader=, number=18, id=0MWBS73J810H2, seriesId=0MWBS73J810GV, libraryId=0MTQGVHEY85DE, deletedDate=null, oneshot=false, createdDate=2025-09-07T21:09:32, lastModifiedDate=2026-04-06T09:24:54.800)
2026-04-06T19:50:17.888+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Adding new books: []
2026-04-06T19:50:17.888+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Try to restore books: []
2026-04-06T19:50:17.890+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Series changed on disk, updating: Series(name=xxxHOLiC, url=file:/manga/xxxHOLiC/, fileLastModified=2026-03-31T23:21:08, id=0MWBS7400181S, libraryId=0MTQGVHEY85DE, bookCount=20, deletedDate=null, oneshot=false, createdDate=2025-09-07T21:09:33, lastModifiedDate=2026-04-05T16:58:52.690)
2026-04-06T19:50:24.443+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Book changed on disk, but still has the same hash, no need to reset media status: Book(name=xxxHOLiC - 第18卷 - CLAMP, url=file:/manga/xxxHOLiC/xxxHOLiC%20-%20%E7%AC%AC18%E5%8D%B7%20-%20CLAMP.epub, fileLastModified=2026-03-31T23:21:08, fileSize=64028472, fileHash=1c2d844e44c7575e538b20604c9ca526, fileHashKoreader=, number=18, id=0MWBS74041EAK, seriesId=0MWBS7400181S, libraryId=0MTQGVHEY85DE, deletedDate=null, oneshot=false, createdDate=2025-09-07T21:09:33, lastModifiedDate=2026-04-06T09:24:54.853)
2026-04-06T19:50:24.446+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Adding new books: []
2026-04-06T19:50:24.446+08:00  INFO 1 --- [taskProcessor-10] o.g.k.d.service.LibraryContentLifecycle  : Try to restore books: []

Komga version

1.24.3

Operating system

Ubuntu 2404

Installation method

Docker

Other details

Run ls in the komga container

ubuntu@971a072d1e22:/app$ ls -la /manga/ | grep Touch
drwxrwxr-x 1 ubuntu ubuntu 0 Sep  7  2025 Touch
ubuntu@971a072d1e22:/app$ ls -la /manga/Touch/
total 1995919
-rw-r--r-- 1 ubuntu ubuntu 73724977 Sep  7  2025 'Touch - 第01卷 - 安達充.epub'

Acknowledgements

• I have searched the existing issues (open AND closed) and this is a new ticket, NOT a duplicate or related to another open issue.
• I have written a short but informative title.
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[gotson]

For any filesystem it's expected that the last modified date of a folder is the same as the most recent last modified date of any of the files inside the folder.

Komga stores the file last modified date in the fileLastModified and uses that to detect whether a series has changed or not.

You need to ensure your filesystem reports accurate last modified date on the folders.