S3 external storage does not check for changes

[plrunner]

Steps to reproduce

1. add a global S3 external storage for all users taking care of using "once every direct access" as the "check for changes" option
2. check AWS IAM policies are correctly defined by adding files through Nextcloud and appreciating those files are successfully added and visible to all users
3. add some files using the S3transfer, the S3 admin console or any other tool other than Nextcloud
4. verify that such files are not visible through Nextcloud

Expected behaviour

We'd expect those files to be visible to Nextcloud users

Actual behaviour

Files are not visible, even after

1. having removed and added the bucket as external storage again
2. having run "file:scan --all"

Server configuration

Operating system:
Centos 7

Web server:
Apache 2.4

Database:
MariaDB 5.7

PHP version:
5.4

Nextcloud version: (see Nextcloud admin page)
13.0.5

Updated from an older Nextcloud/ownCloud or fresh install:
No

Where did you install Nextcloud from:
Official tarball

List of activated apps:
only stock apps

Are you using external storage, if yes which one: local/smb/sftp/...
S3

Are you using encryption: yes/no
no

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
LDAP user (although local admin is experiencing the same problem)

Client configuration

Browser:
anyone

Operating system:
anyone

Nextcloud log (data/nextcloud.log)

No relevant log entry

[plrunner]

Maybe duplicate of #6954.

[nextcloud-bot]

GitMate.io thinks possibly related issues are #6113 (S3 won't connect as external storage), #4730 (Storage), #1564 (External Storage doesn't check for changes when it should, and SMB is slow), #3789 (External storage), and #5706 (Can't use external S3 non-AWS storage).

[rullzer]

@icewind1991 this is not supported right?

[szaimen]

Is this Issue still valid? If not, please close this issue. Thanks! :)

[ghost]

This issue has been automatically marked as stale because it has not had recent activity and seems to be missing some essential information. It will be closed if no further activity occurs. Thank you for your contributions.