Issue with + and # in filenames when syncing via client

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We are experiencing sync problems with filenames that contain certain characters. Files with + or # in the name fail to sync when using the Nextcloud Desktop app.

  • Example: test+file.docx or report#1.pdf

  • Files remain unsynced and show errors in the client.Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can.

Is this a known limitation or bug in the Desktop app? If so, is there any recommended workaround or planned fix for syncing files containing + or #?

The Basics

  • Nextcloud Server version (e.g., 29.x.x):
    • 31.0.9.1
  • Operating system and version (e.g., Ubuntu 24.04):
    • Ubuntu 22.04.5 LTS
  • Web server and version (e.g, Apache 2.4.25):
    • Apache/2.4.52
  • PHP version (e.g, 8.3):
    • PHP 8.2.27

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