pulsing

Hello Guys i hope you all doing well. I have a 2016 Seat leon FR+ MK3 specifically the 2.0 TDI 150hp DSG6 (110KW TDI CR) (engine code CRMB). The engine start pulsing on idle only after the car warms up (not noticeable on RPM meter but you can defenetly hear it and feel it when you pay attention...

any one here got a non-revo mk4 petrol cupra and notice what i can describe as pulsing acceleration especially noticeable in 3rd gear going flat out? i have driven 4 other petrol cupras and they all did the same thing? can anyone enlighten me? :think: