Can't undo blueprint/material movement done by arrow keys

When moving nodes in materials and blueprints using the undo option doesn't undo the movements made by the arrow keys. This issue affects anything that uses nodes on an event graph.

1. Create a new blank project (no starter content needed)
2. Create a new material and open it
3. add any kind of node and move it with the arrow keys
4. undo the action (Ctrl+z or the option in the toolbar)
5. Create an actor class bp and open it
6. Go to event graph
7. move Event begin play node with arrow keys
8. Undo the action

EXPECTED: Movement by the arrow keys to be undone

RESULTS FOR MATERIAL: Node is deleted for material (as placing was the last action beside moving it with the arrow keys)

RESULTS FOR ACTOR CLASS BP: Nothing is undone (as aside from moving no other action has been taken on the event graph)

i have this problem UE4CC-Windows-58DC12AF4B97F057BD108FBFF569B2E9_0000

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