[Bug]: Drag and drop of multiple files, uploads just one file

[SMH17]

⚠️ This issue respects the following points: ⚠️

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

Bug description

If you attempt to upload multiple files with drag and drop from web interface, only one of the files is uploaded.

The new drag and drop interface that previously was affected by this bug introduced with Nextcloud 28.0.0 that prevented drag and drop use completely, hasn't drag and drop functionality properly working and latest stable 28.0.3 is affected by this other bug with multiple files drag and drop.

Steps to reproduce

1. Select more than one file
2. Drag and drop them in web interface

Expected behavior

All dropped files must be uploaded

Installation method

Community Manual installation with Archive

Nextcloud Server version

28

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.0

Web server

Apache (supported)

Database engine version

MariaDB

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

[solracsf]

Duplicate of #43074