I get this in sport mode but its the downshift from 2nd to 1st and only in random times, not all the time which is a bit frustrating.
Allegedly there is some sort of gearbox update that resolves but I really have found no concrete evidence of that.
how old is the dsg oil? i had mine done not to long back and it did seem to make a difference in smoothing this, it wasn't gone but a lot better