[NTG-context] Math align not working

Hi there, I noticed that Math align is not working properly. In particular I mean the alignment. For example, the following code \starttext \startformula \startalign[m=2,distance=8em,n=5, align={right,middle,middle,middle,left}] \NC 0 \NC < \NC 2x + 5y \NC < \NC 10 \NC 4 \NC < \NC 3x + y \NC < \NC 9 \NR \NC 3 \NC < \NC 2y + 3z \NC < \NC 15 \NC 10\NC < \NC 8y + 5z \NC < \NC 20 \NR \stopalign \stopformula \stoptext is copied from https://dl.contextgarden.net/myway/mathalign.pdf but doesn't produce the intended result. What's wrong? Best regards, Johann