NebulaHaze
Administrator
For reference on buds that die from re-veg, this grower harvested his plant except some buds and a few leaves, then tried to re-veg it.

Within just a few days it started making new leaves, but the buds had already dried up and died. That top bud in this pic sort of reminds me of what your bud looked like.

If anyone is curious how it turned out. It grew into a plant and was harvested again. The grower told me it didn't end up saving time compared to growing from seed since it took a few weeks before it started growing normally. He also hated that he didn't have as much control over the shape, so he decided he wouldn't re-veg again except for outside to reveg a Spring harvest.
Within just a few days it started making new leaves, but the buds had already dried up and died. That top bud in this pic sort of reminds me of what your bud looked like.
If anyone is curious how it turned out. It grew into a plant and was harvested again. The grower told me it didn't end up saving time compared to growing from seed since it took a few weeks before it started growing normally. He also hated that he didn't have as much control over the shape, so he decided he wouldn't re-veg again except for outside to reveg a Spring harvest.