I have searched the existing issues, both open and closed, to make sure this is not a duplicate report.

• Yes

The bug

Immich does not retain original file names when using the beta timeline. This changed from the behavior in the old timeline, which retained the proper file name.

As an example, here is the same file in both the iOS Photos app and Immich:

Immich	iOS Photos

The OS that Immich Server is running on

TrueNAS ElectricEel-24.10.2.2

Version of Immich Server

v1.137.3

Version of Immich Mobile App

v1.137.2 build.213

Platform with the issue

• Server
• Web
• Mobile

Your docker-compose.yml content

n/a

Your .env content

n/a

Reproduction steps

1. Save a photo with a bespoke file name to the iOS gallery.
2. Verify the file has a custom name in iOS Photos by viewing its details.
3. Enable beta timeline in Immich.
4. Back up the asset to Immich.
5. Cross-check file names.

Relevant log output

Additional information

No response