Some mag. nitrate may help, the nitrate will help them green up faster, spray some on them if you have any on hand.
RH right now is drrrrrry like 30-35%
In low humidity the pots should be drying quickly, you may need to feed a bit lighter.
The transpiration rate may be too high due to low humidity, causing the plant to uptake liquid faster than usual.
Lowing the feed strength should help with the lockout type symptoms too.
Or try raising your humidity…think VPD #'s