If they were fine before you put them in that soil, then I would say, yes, you have a soil issue.

I can't tell if it's nuteburn/saltburn or ph or combo of all three. But I'd change your medium back to FFOF asap.

Ok I see you already did....good. You say this happens every grow? Well then I doubt I'll be able to fix it for you.

I'd certainly stop with ALL ferts and che check ph.....then consider flushing even if ph is correct to try and correct some of that fert/salt burn.