Action "Assign the task to a specific user " only working in the same swimlane

Dear all
I created a project with 4 columns and 3 swimlanes.
The I defined an action
Assign the task to a specific user
Event name = Move a task to another column
Column = ready for Training
Assignee = XXX
This works fine when moving a task to column “ready for Training” in the same swimlane but will not set the new Assignee if moved to column “ready for Training” but to another swimlane.
Please advice…