Position of link change with number of component in Rectangle (idem with node)

Question

Hello,

I use plantuml.8036.jar

 

The number of embedded component change the layout of links. Why?

 

@startuml

 

Rectangle DataSource as DataSource {

' comment (1, 2 or the 3 components'

component C1

component C2

component C3

}

 

Node aaa 

Node bbb

 

DataSource --> aaa : Change with the number of component in DataSource

aaa ==> bbb

 

@enduml

 

Could you please help me?

Thanks for this great software

Serge