Hello.
I have found a way to reproduce this problem.
Please follow these steps
(1)Open File Explorer Options.
(2)Click on the View tab.
(3)Check enable the "Launch folder windows in a separate process" option under the Advanced settings list.
After making this setting, double-clicking an MS Office file(pptx, xlxs, docx) in the Fence folder causes a problem.
This defect does not occur in Fences 3, but does occur in Fences 4.
Could you please check?
Thank you.