Hi ya!
Mine had that issue at low speed a couple of times.
Since then, I have put a bottle of injector cleaner and use Millers fuel on every fill up and so far...
I think that it helps giving the car a long blast on the motorway once a week as this will clear it out if using the car on mostly town driving. For me, this is no problem, being that the M3 is close to me and that my young boy wakes up at stupid o'clock, teething etc.. and the only way to get him to sleep is going for a drive!