creating a folder called "New folder" does not work

[individual-it]

Describe the bug

I somehow ended up in a state where I could not create a folder called "New folder". All other folders would work, but I could not upload a folder called "New folder" with the desktop client nor create this folder with the WebUI.
After restarting ocis (with more logs) it showed me that this folder already exists and had some items.

Steps to reproduce

I cannot reproduce it so-far, but I want to log it, in case it happens again

Expected behavior

An existing folder should be shown

Actual behavior

Somehow the folder existed on the system, but was not shown
When trying with the desktop client, I could first create the folder and place a file in there, after a while the file would be deleted locally and then also the folder would be deleted

Setup

Please describe how you started the server and provide a list of relevant environment variables or configuration files.

OCIS_DECOMPOSEDFS_METADATA_BACKEND=messagepack
OCIS_URL=https://192.168.56.1:9200 
./ocis-3.0.0-rc.1-linux-amd64 server

Additional context

The only thing I have is the log of the client
ownCloud.zip

[micbar]

could be related to the caching issue, closing.