[NTG-context] Problem with \setupinterlinespace

In this example interlines spaces look a bit strange to me \starttext \input knuth \begingroup \tfx\setupinterlinespace[reset] \starttyping function newCounter() local i = 0 return function() i = i+1 return i end end c1 = newCounter() print(c1()) --> 1 print(c1()) --> 2 c2 = newCounter() print(c2()) --> 1 print(c1()) --> 3 print(c2()) --> 2 \stoptyping \endgroup \input tufte \stoptext Can someone confirm this ? -- luigi