Key ignition issues, normal or not ?

Hi all,
I bought a California T, white, year 2014 with 7500km on it. Immediately I had some weird issues with key ignition that I did not know if they were part of extra security for the brand, or just a weird problem, which I now think it is.
Here is the issue : when I turn off the engine and pull out the key (from ignition 0) the key comes out but the round circle part around the key (the white metal part with a ~1cm diameter) does not come out which it should (it should stick out by a few millimeters when they key is out vs when the key is in). If I put the key back in only by a few millimeters I am able to turn it to ignition 2 and take the key out of it, which sounds VERY weird to me, I have not tried to turn the motor on with the key out but pretty sure it would work at this stage, anyways I can get ignition 2 and the key in my pocket.
I brought it back to the dealer who lubricated it but it still does that most of the time, even tough it is slightly better.
Any idea / opinion ?
Thank you in advance !