[NTG-context] \underbar and co. not working properly in MkIV

Hi, list. The following works well in LMTX, but it applies underlining to the next dash sign when compiled with MkIV: \starttext %\overbar{foo}-bar \underbar{foo}-bar \stoptext I've found a workaround for it, but I want to know about the reason for such a strange behavior. Thanks beforehand. Best regards, Jairo