[Bug]: File modified date is in very far future

[ChristophWurst]

⚠️ 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

this showed on my test instance the last few weeks. Not sure how I ended up there.

<d:propstat>
      <d:prop>
        <d:getcontentlength>8651588</d:getcontentlength>
        <d:getcontenttype>application/octet-stream</d:getcontenttype>
        <d:getetag>"086d1af85296de0937ce900fcc62f5fc"</d:getetag>
        <d:getlastmodified>Thu, 10 May 2446 22:38:55 GMT</d:getlastmodified>
        <d:resourcetype/>
        <nc:has-preview>false</nc:has-preview>
        <nc:mount-type/>
        <nc:share-attributes>[]</nc:share-attributes>
        <oc:comments-unread>0</oc:comments-unread>
        <oc:favorite>0</oc:favorite>
        <oc:fileid>36291</oc:fileid>
        <oc:owner-display-name>Christoph Wurst</oc:owner-display-name>
        <oc:owner-id>admin</oc:owner-id>
        <oc:permissions>RGDNVW</oc:permissions>
        <oc:share-types/>
        <oc:size>8651588</oc:size>
        <x1:share-permissions xmlns:x1="http://open-collaboration-services.org/ns">19</x1:share-permissions>
        <nc:hidden>false</nc:hidden>
        <nc:system-tags/>
      </d:prop>
      <d:status>HTTP/1.1 200 OK</d:status>
    </d:propstat>

Steps to reproduce

1. Upload files, I guess

Expected behavior

Reasonable modified time in the past.

Installation method

None

Nextcloud Server version

28

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

[ChristophWurst]

filecache mtime and storage_mtime are 15032385535

[susnux]

Looks like JS timetamp is somewhere used (which is ms instead of seconds)

[ChristophWurst]

15032385 is not a reasonable timestamp for my files either

[artonge]

Should have been fixed by nextcloud-libraries/nextcloud-upload#946

[ChristophWurst]

Thanks a lot for checking!