Your problem same as mine...
got the problem when car was 1mth old !!!

hilited the problem to TC during 1K servicing...they jz lubricate, hilited again during 5K ...told by them part rectified not replace., within an hour came back again..

. Called TC and informed them this was not accpetable., ask me to make appt to chg the part. Now ok...but still hv very slight tok tok sound and steering wheel position is not centre when car is straight ( shoody workmanship). Now car 8mths old...jz wait till next servicing to make the steering centre.
IMO either the coupling got design problem or not fixed properly during installation.
Jz that i had chg countless steering couplings during my ns time as veh mech.