Optimal route is not optimal

My setting is on optimal. However, when i plan a route from Leiden (Netherlands) to Trouville (France), for example, the system suggested a single chargingstop of 41 minutes, wherry’s ik I manually add a stop at Ionity Seclin , a second stop is suggested at Tesla Amiens. The Total chargingtime in the 26 minutes, resultanten in a shorter trip. I request that you review the algoritmes