DSG oil leak

[DW98]

Hi everyone, had a service yesterday everything was all good apart from a leak on the DSG. It’s a Cupra 300 with the 6-speed gearbox. Before I take it back I was wondering if there’s any common issues that people have come across. I’ve also notice a few times recently when changing into reverse there’s almost a few seconds longer before it starts moving wether this helps? Would also be a good help if anyone could recommend any garages other then the dealers around the north west that are clued up in dsg systems.
Thanks in advance!