[NTG-context] About the indent after a displayed formula

Dear all, I found that if a paragraph is ended by a displayed formula, the first line of the next paragraph will not indent. It is a feature or bug? And how do I enable this indent? The following is a very simple example. Please note the second paragraph. \setupindenting[medium, yes] \starttext This is a test file. \startformula x^2+y^2=1. \stopformula This is a test file. This is a test file. \stoptext -- Longmin Wang Math. Dept., Nankai Univ., China http://math.nankai.edu.cn/~wanglm/ GnuPG-Key ID: 1024D/2A5CFA5C Fingerprint: 8587 1246 3AAD C185 D419 ADF1 B620 D8B8 2A5C FA5C