Shelf life 3Cylinder F56 Cooper

After long years of abstinence, we are about to order an F56 Cooper. I read zero-commanix here about engine problems of the 3cylinders. No chain problems like the R56, no problems with durability even at high km running performance Can I conclude that these engines are completely problem-free? Or are there any constructive problems with these engines (control chain, cokes etc?) The bearing shell history from the first series is known to me, but since I’m looking forward to your answers. Greetings