Seen with client 2.9.0-beta2 on Windows 10 (Enterprise Evaluation) version 21H1 (OS build 19043.1165)

• Start to setup the oC Desktop app
• Fill in server, user and password
• In the new window select "Synchronize everything from server" and select/unselect different kinds of folder with and without sub-folder. Wait until everything is sync.

Actual

• Click on a folder with and without sub-folder the arrows is displayed.
• When minimizing the directory tree and opening the it again, the arrow for folder without sub-folder disappears.

Expected

• Folder without sub-folder should not have arrows.