After delete a file, the file pane doesn't refresh automatic

After delete a file, the file pane doesn't refresh automatically

After delete a file, the file pane doesn’t refresh automatically.
I have to press F5 to refresh it. Do I miss some option in the preference setting?

This only occurs with Chinese file name, may be a bug.

OS: Win2003 server, English edition
opus: 8.0.1.2 trial edtion

a bug?