I_and_Ianswered grow question 5 years ago Dousnt look like bud rot to me, more like burn
My experience of bud rot was when I pulled the leaf it came away super easy with no resistance because the base of the leaf in the buds would be gone from the rot
The leaves with rotten base stems will look a wierd dark colour, not so much dried like that from what I saw when I had
Goodluck