iCloud shared folder alias shows blank icon in Dock

1. I created a shared folder: iCloud_Shared Folders_FolderX
2. I created and Alias of FolderX and placed in on Local Desktop
3. When I scroll in the Dock through Desktop Folder Stack then FolderX is displayed as Blank Sheet icon (with Alias arrow) all other visualizations (grid, list) replicate the same issue
4. When I drag FolderX to the Dock it is also displayed as Blank Sheet icon not as a Folder icon

Is this a bug?

MacOS 15.6.1 (24G90) on Intel iMac (3.3 GHz 6-Core Intel Core i5, AMD Radeon Pro 5300 4 GB, 128 GB 2667 MHz DDR4)

Thank you.