Engine shuts down while driving

Hello everybody! I’ve been new to the forum since today. Has any of you ever had the experience with a Harley that the machine suddenly shuts down during the ride? I bought my Softail Heritage 2007 new. After about 1 1/2 years this started to jerk and no perfect ride was possible any more. My HD dealer could eliminate the error. A few months later followed. Phenomena: The machine suddenly stopped during the ride. On “Gasgeben” no reaction, all e Lectrian contacts are interrupted. After a short wait for new start and further drive again possible. Then no further interruptions. This happened now every time at an exit. HD dealer did not recognize an error message. After the “motor shutdown” regularly repeated itself, the “black box” was changed to Kulanz. After a few months of rest, but then again the irregular engine shutdown during the journey independently of the travelled distance. I now got away with it. find and set me now at every new exit on it, but can not be a permanent condition. Imagine, the engine stops during an overtaking process or during a tunnel crossing. In good conscience the HD can not be sold either. Danger Km in 10 years approx. 11Tsd. Can someone help me? Thank you! Gerhard Völkle