[Bug]: wrong estimated time shown when doing sync

[mgallien]

⚠️ Before submitting, please verify the following: ⚠️

• This is a bug, not a question or a configuration issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server and Desktop Client are up to date. See Server Maintenance and Release Schedule and Desktop Releases for supported versions.
• I agree to follow Nextcloud's Code of Conduct

Bug description

Sync progress reported on main dialog can show invalid estimated remaining time.

Steps to reproduce

1. Start a full sync from a newly setup user account.
2. Open the main dialog
3. See that before downloading any file, the reported remaining time is invalid.

Expected behavior

Either a valid estimated remaining time is shown or nothing.

Which files are affected by this bug

not a specific file

Operating system

Mac OS

Which version of the operating system you are running.

macOS 13.0

Package

Other

Nextcloud Server version

24.0.4

Nextcloud Desktop Client version

3.5.82

Is this bug present after an update or on a fresh install?

Fresh desktop client install

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

Are you using an external user-backend?

• Default internal user-backend
• LDAP/ Active Directory
• SSO - SAML
• Other

Nextcloud Server logs

No response

Additional info

No response