I'm seeing this as well in a few of my plants.
This isn't all that bad a thing. There is no THC in pistils so they're just decorations anyway.
What has happened in the past is the plant will greatly reduce flower production, but the calyxes will swell remarkably. Calyxes have the highest number of trichomes. They are also comparatively heavy.
Two of my favorite strains are doing this, outdoors. The buds are small, but the odor is intense, and the trichomes are huge.
As a country boy who listened ro my elders predict the weather, based on observations of plants, animals and sky, I think we're headed for a strange Winter.
My cats seem to be putting on their Winter coats early.
I'm just guessing, but I think we may get some early weather, any time.
Any thoughts?
VG