I am having similar issues. Have flushed with 6.5 water for a week and a half. Foliar feed Epsom salt 1/4 tsp per gallon. And still have this issue. I'm in week 4 flower and I need HELP!
would you want to add a grow nutrient while flowering to fix this? I too am have WS 's problem but I can't figure out what's up. I will post pics further in thread.