Anyone ever see this happen. One branch is acting like it’s not getting water. No damage to my knowledge. Worried neighbours might be spraying something threw the fence.
what’s your environment like mate? temps, RH, etc.
I’ve just had something similar due to Heat stress - some of the buds are really stunted and I had to cut them.
If no other issues just cut it off and forget about it. and maybe set up a gopro 
Thanks man I cut it off I’m southern Canada so not a heat issue. Maybe bud rot? The rest looks fine. Thanks for reply.