You most certainly have an electrical problem, have you had the fault codes read out yet?
Well it sure has a problem now and something should show up on SDS, maybe the previous owner never used the paddle shifters and did not realise, you have used them and a fault occured so there will be fault codes set now.Nop I didn't get the codes read yet but before buying I had it inspected on star SDS but nothing came up on tran being faulty