Files uploaded on s3 bucket with other clients are not listed (same IAM user)

[Minnoit]

Steps to reproduce

1. Create a bucket and an IAM user with full access to s3 resources
2. put some file into the bucket
3. In OC, add an Amazon S3 resource with the IAM user credentials
4. Browse the bucket on OC (will correctly list the files)
5. Create other files into the bucket using AWS console or, using same IAM user, s3cmd or S3Browser (same happen using Duplicity)
6. In OC, browse again the bucket

Expected behaviour

Should list all files in bucket

Actual behaviour

Only previously listed files will be listed.
New files uploaded by OC will be correctly listed.
Browsing the bucket with AWS console, s3cmd or S3Browser will show all files.
Similar things happens using 2 IAM users on same bucket (configuring two S3 resources in OC).
May be related to
#7543

Server configuration

Operating system: Linux

ownCloud version: ownCloud 6.0.2

Updated from an older ownCloud or fresh install: update from 6.0.0.16

List of activated apps: files_external

Are you using external storage, if yes which one:
Using several s3 resources, some with the same IAM user and others with different IAM user.

Are you using encryption: no

Client configuration

Browser: Firefox

Operating system: Ubuntu

[PVince81]

Closing as duplicate of #11652
Also see #11797