[Bug]: Unable to update share expiration date

[nfebe]

⚠️ This issue respects the following points: ⚠️

• [X] This is a bug, not a question or a configuration/webserver/proxy issue.
• [X] This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• [X] Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• [X] I agree to follow Nextcloud's Code of Conduct.

Bug description

Changing share expiration date does not work immediately, unless expiration date is completely unset and then set again.

Steps to reproduce

1. Create share with expiration date
2. Update expiration date to value allowed by configuration
3. Save
4. Verify

Expected behavior

Once a new date is entered and save is clicked, the new date should be applied

Installation method

None

Nextcloud Server version

master

Operating system

None

PHP engine version

None

Web server

None

Database engine version

None

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

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• [ ] Default user-backend (database)
• [ ] LDAP/ Active Directory
• [ ] SSO - SAML
• [ ] Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response

[nfebe]

Additionally, when creating a new share, if the set expiration date is unchecked, the expiration date is set anyways.

[susnux]

same on 28

[doits]

:+1: 28.0.2 really did break creating shares for us, definitely a regression in a minor version upgrade