I don't see what you're seeing here... and I don't see any signs of bud rot. The earliest OUTWARD sign of bud rot is going to be a completely dead sugar leaf that, when pulled on, easily detaches... Your plants, your grow, looks absolutely lovely albeit pretty dense. Make sure you keep the humidity in the 40s and that you have good air circulation into the plant...
Good luck! You'll be in trim jail soon - for a LONG time it looks like!