It happens on some strains and some conditions late in flower so I don’t believe it just means that it needs more time.. if all your buds are making new pistils id agree maybe but I’ve seen this on one of my BBs in fact. It’s usually right up top closest to the lights and it almost looks like reveg. I think it honestly could be a reaction to too much light, or maybe just a genetic thing? But if it’s just up top on a few and growth looks a little weird up there it’s probably light stress