System to subsystem transition + port delegation

Based on a logical architecture which contains port delegations, the Subsystem to system transition manage with difficulties the port delegation and its associated component exchanges.
When I use the Capella project generated through this transition, all the component exchanges (at system level) appear on the new [SAB] created, except those related to port delegation (see attached image). Even if I select it through the “select wizard” window.
The only way I found, is to change these components exchanges from “delegation” to “flow” (kind property). Then they appear on the diagram [SAB], but with a new issue… The component ports are in opposite directions ! In fact source port is in the wrong direction (see attached image).
Is it normal or due to a wrong using of Capella Add-on?
Thank you in advance.
Romain D.