[NTG-context] withcolor does not apply when anglestriped

Hello list, I noticed today that anglestriped does not take withcolor into account. Givent this MWE \starttext \startMPpage path p; p:= fullsquare scaled 20; draw p anglestriped (1,60,4) withcolor red; \stopMPpage \stoptext p is in black, while I'd expect red Greetings, Damien Thiriet