[NTG-context] Item group parentheses

I'm defining item groups in ConTeXt and I find the following issue: combining the "text" parameter with others automatically disables "left" and "right" keys, so numbers always appear enclosed in parentheses. %What I expect: %I. This ain't right %What I get: %(I) This ain't right \defineitemgroup[erroneous] \setupitemgroup[erroneous][1][R,text,continue][left=,right=.,stopper=] \starttext \starterroneous \startitem This ain't right \stopitem \stoperroneous \stoptext Maybe a bug, I want to know how to get the expected result. Thank you in advance.