I had the same issue last month thinking it was a leak from the top of the radiator. So I ordered a new one, 1000 €, in backorder for several months! So I went to a radiator repair shop. One day later a got a phone call telling me there was no leak after testing under pressure. I checked the hoses and they looked fine. I just ordered new clamps and no more leaking detected😀. I also had some problems to cancel my order but finally got my money back. So this time a backorder saved me a lot of money...