[NTG-context] \startchapter[title=Test] is not working inside \startcomponent

Dear Listers, \startchapter[title=Test] is working inside \starttext and \stoptext. But it is not working inside \startcomponent and \stopcomponent. Is it a natural behavior? I am using iMac, OSX Mountain Lion. And the ConTeXt version is "ConTeXt ver: 2012.08.28 20:00 MKIV fmt: 2012.9.4 int: english/english" A short test file is: %\startcomponent \starttext \startchapter[title=Test] \input knuth \stopchapter \stoptext %\stopcomponent Thank you for reading. Best regards, Dalyoung