If subfolders are specified in path, CC finds no duplicates

.
I use CC 5.34 in Win 10 Pro.
If I specify a search path below the root "\", I'm unable to find duplicate files. The message is "File search has completed".
For example, I find no files if I specify the path:
E:\Documents\*.*
But I can find hundreds of duplicate files if I specify only the root:
E:\*.*
In the second example, CC finds dozens of duplicates in the "Documents" folders, which it did not find using the first search.
I would be grateful for any advice.
Thanks.
.