DrJynx86answered grow question 4 years ago Those hairs are growing inside the calyxes, when calyxes fat enough they might explode and show those white hair explosions late during bloom.
Heat or light stress might do that, also cutting or topping a tiny bit of the bud will trigger that.
In no way that's lower potency, but you might need to keep the plant flowering a couple of weeks more because those pistils aren't mature.
Happy smokes!