955i, engine goes off again and again

Servus Triumphler, I’ve just been takin’ the Sufu, but I didn’t find it. I’ve been my beloved 955i for years (since 1999). I’m still happy with the good one – with a small hook… The engine tends relatively regularly to go out at the dome or even at the traffic light (without clutch). Since the workshop never really got it right and the information that it’s just like that doesn’t really help me, I thought I’d ask the question here. K Does the problem still exist for one / anyone who has a 955i??? Did someone have it and got it under control? And don’t tell me now that I’m late – I just endured it until today. I’m grateful for every tip, because there is hardly a tour on which she doesn’t run out at least once.