If you have been feeding from start, ease back. Check pH.
If anything look like trace elements deficiencies due to contrortion, maybe salinity does that? but, if you have been feeding since start in soil, it is almost certainly lockout due to an overabundance of nutes.
water only for a while.. get it ph'd to ~6.5-6.8 and see what happens. Easier to add something later than take it out again.