Yes, in my case as well it was the Two Carenado GA planes i had bought some time ago.
The Ovation and the Seminole.
@WombiiActual has a temporary FIX for JN4 & A310s that have this issue, (That removes the AI sound) and its really easy to add other planes to that “NO AI sound”
However, since this BUG seems to have been introduced in SU11, hopefully it will be fixed by Asobo in SU12 .