Cant Duplicate (Ctrl w)/Copy Paste any node in Materials Editor

Development Rendering
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5

Sorry for late reply (working and finishing CS degree). So I tried that with no luck. Here is what I did:

  1. Clicked on Material Editor Tab (also tried clicking on grid)
  2. Clicked on the node
  3. Clicked Ctrl+w (screen flashed but no new node was created)
  4. Clicked Ctrl+z (displayed “Undo: Material Editor: Paste”)
  5. Clicked Ctrl+c (while node was highlighted)
  6. Clicked Ctrl+v (nothing happened, not even a screen flash)

Any other suggestions would be well appreciated.
Tried on two versions: 4.4.3 & 4.5.1