vertical alignment not honored

Question

In this graph, the A --> B edge is not vertical as requested, unless I remove one sub-element of A

@startuml

node A {
  artifact x
  artifact y
  artifact z
}

node B

cloud I

node G

node H

A --> B
B -> I
I --> G
I -> H

@enduml

Answer 1

Unfortunatly, we are facing here some GraphViz limitation.

The only workaround is to use a longer arrow: A ---> B instead of A --> B

The result is slightly better, but there is no way to center the AB arrow.

Hope this helps!