flowers (not bud yet) seems to be turning brown on the tips and drooping

i couldn't get a great pic of it but ill give ya the best i've got.
Its at 2 weeks tomorrow into flowering autoflowering ak47 going based on what they sent me it is on a 20/4 hour light

I am using ff big bloom and tiger bloom in a bubbleponics(last time) system with cfl and 2 duel spec 2 lights

I should note the ones near the top look as good as ever.



Here is a post i made last week aboout my plant having issues at the bottom because of issues when it was younger could this be the reason?
https://www.rollitup.org/marijuana-plant-problems/93471-little-advice-wise-people-who.html

no advice? the plant looks good the nodes are just droopy and brown.