Cognos 11.0.1: Users Unable to Delete Reports/Folders from "My Content"

[Cape Cod Gunny]

We're running IBM Cognos Analytics version 11.0.1. Users are experiencing issues when attempting to delete reports or folders from their "My Content" area. The process is as follows:

 1. User clicks on the three dots (...) next to a report or folder. 
 2. Selects "Delete" from the dropdown menu. 
 3. A confirmation window appears; user clicks "OK".
 4. The window closes, but the item remains in "My Content".

No error messages are displayed, and the item is not deleted. 
 
Troubleshooting Steps Taken:

 - Verified that users have "Write" permissions on their "My Content"
   folders.
 - Checked ownership of the items; users are listed as owners.
 - Reviewed folder hierarchy for overridden permissions; none found.

Question: Are there any known issues or additional settings in Cognos 11.0.1 that could prevent users from deleting items in their "My Content" area?