Reproduces in every version back to 5.1.7 where property highlighting was first introduced.

Repro steps
1. Create a PBR Shadergraph and open it
2. Create a new Vector 1 property
3. Drag the property onto the graph and click the created node
4. With your mouse still over it, delete the node
Expected result: the highlighted property on the blackboard is deselected
Actual result: the highlighted property on the blackboard stays selected and won't deselect until you mouse over another node for the same property