[NTG-context] Forcing indentation on item groups

Hi list. I have the following example: \setupindenting[yes,medium] \starttext \startitemize[n,text][stopper=,lefttext=(,righttext=)] \startitem A\stopitem \startitem B\stopitem \startitem C\stopitem \stopitemize \stoptext The item group doesn't follow indentation. Adding \leavevmode only has effect on the first line, and only insert a spurious space from the second item on. How would I solve this? To be clear, I want indenting before numbers, i.e. <indent>(1), not (1)<indent>. Thanks beforehand. Jairo