Kia Ceed steering heavy!

Hello dear forum members! Does anyone know the problem or has had similar experience with the steering at Kia Cee ́d and maybe also knows an explanation or solution for it? My Kia Cee ́d is a 1.6 petrol engine, year 2009, Mopf with 90hp. Problem: When driving straight ahead (from about 70 km/h) the steering wheel should be slightly moved (hold track), this must be done with an increased effort. It feels like you have to steer against a resistance shortly. e. The whole thing is not safety relevant but it disturbs me noticeably. Otherwise the steering is easy and does not cause any difficulties, just like the rest of the car. Thanks already in advance for your answers! Greetings Lyskrys