Yeah, you rarely get consensus on these boards so just take everything as "possible leads" that you will need to research further.
FFOF is a pretty hot soil so it should give you plenty of nutes for first month your plant is in it. This makes me think you might have an over-feeding issue but I don't really see it in the leaf structure, your tips will usually bend down or hook right at the end and yours are just a gentle over-watered looking gentle arc. Your burned leaves have tips bent upward which is often heat stress. Did you have some heat stress issues a couple weeks ago?
Your issue is confusing to me too, so it seems like there could be more than one thing going on. Is your source water in a good ph range? I am guessing you have a lock-out issue from the color of your leafs and assumption that it would not be deficient of anything in FFOF soil this early. If it is a lockout issue it is either ph related (which I doubt unless your water is really wonky) or over-feeding of some particular element.