Remove a passenger in Caroster plus event show a wrong toast

In a Caroster Plus event, when I remove someone from a passenger list, a toast tells me that he/she has been added to the waiting list. But there is not waiting list in Caroster Plus event.

Expected behavior: Toasts shows a message like "Passenger has been deleted and notified".

...And be sure that the passenger receives notifications (in-app and by email).