sorry,i did not articulate.steps as below:
1.open a tab on right panel ,and browser to c:\(bug only occur on c:\,or system driver maybe)
2.enable "lock tab--allow subpath change"
3.focus this tab
4.click refresh button on toolbar
5.result : MC open a new tab at c:\ on right panel.
and another bug :
1.open a tab and browser to c:(can be lock tab on left panel,or unlock tab on both panel)
2.click refresh button on toolbar
3.swith to another apps,can do this by press atl+tab
4.swith back to MC,also can by press atl+tab
5.result : MC open a new tab at c:\ on right panel.