Could have been from the stronger feed strength if the twisting is new. Mn seems excessive and could be causing an uptake issue, Id lower to half what it is now from 3 to 1.5.
Add Mo.
Thanks guys! I'll keep the EC as is and change the Fe:Mn ratio to 2:1. I have sodium molybdate but forgot to add it =[ . What's a safe range ppm wise? 0.05-0.1? I'll see how everything goes with those changes and assess from there.