2009 dsg gearbox issues

Hi guys. Love the forum. About to tackle my dreaded dsg gearbox. Had the mech unit done last year and don't have any probs replacing circuit boards in there but wanted to know if anyone had tackled the one inside the gearbox itself as I think I still have a fault here as my car jumps out off gear when you try Accelerate harder than normal. Just goes into neutral then comes up with the dash mess gearbox malfunction no reverse. Cont to drive. But scarry when pulling away at roundabouts as think someone is going to rear end me one off these days. Anyway. Pull over switch off and restart and all.is fine.again. no codes being stored. As a result off already doing the mech repair can only think this now must be down to the 1st gear pickup sensor or someit in the gearbox. ANY input is welcome on this guys as for what I can see and read on the forums dsg problems is pretty common on the b8 8.5 platform. Mine is a 2009 3.0 avant. Keep uk the goid postings as always a good read.