Right mate, I had a flick and it looks to me like your nutes are too strong.
Few questions first though if you don't mind.
What exactly are you feeding them and do you know the ppm or E/c. If your following a chart just post a pic
How often and how much are you feeding them?
And how long have they been in those pots?
Should only be in there for like 14-17 days mate. If they get root bound all sorts of wierd and wonderful stuff can happen. It could just be that but if you tell me the rest I'll know for sure and be able to knock you back on track for life after the transplant. Few tweeks here and there and you'll be plain sailing