MoveAction: Highlight of target node unreliable

[tinxx]

When moving a node onto a different node, the target node is highlighted.

After picking up a node it can be moved between different targets that should be highlighted, currently with a strong glow effect.

However, this highlight effect is not consistently shown on every target node or even on the same target at different points in time.
There is no error/warning message in the console.

Both images show the same node in grabbed state moved onto the same target node on a Reflexion City.
The first shows the target (and moved) node in highlighted state. On the second image, the highlight effect does not work.