[BUG] Redo fails to restore pasted Assign node

[matKlju]

Bug description:
Redo does not restore the last pasted element. Scenario: add Assign, copy it, paste it, then undo twice and redo twice. The previously pasted Assign element is not restored by redo.

Expected behavior:
Redo should fully restore the last undone paste action, including the pasted Assign element.

Screenshots:
N/A

Additional information:
Repro steps:

1. Add Assign
2. Copy Assign
3. Paste Assign
4. Undo
5. Undo
6. Redo
7. Redo

Result: pasted Assign is not restored