IBM CCM doesn´t display new created folders or files

Last week I had the issue, that I could not see a new created folder in the Connections CCM. The
browser looked the following:

But the created folder was correctly displayed in the MS Desktop Plugin:

After some investigation and also going through the logs of the CCM server, I found out, what caused the problem: it was the display option, why the file and the folder have not been displayed !! After switching from the preview list to the list option everything was displayed correctly:

Working as designed ???