I got to thinking and I think it's possibly pH related. It might be more pissed about how high I've been feeding them, and the others don't care as much. I've been feeding at around 6.6-6.8 (I think anyway, I need a new pen) because I was avoiding adding pH down since the bud explosion dropped it there and I thought it would be good. And I thought it would help with magnesium uptake. And I might have locked out zinc.
I think my water drifts up a bit over time as well, which doesn't help. I think i remember seeming to have less problems closer to 6.3 pH. It takes a decent bit of pH down to get it down there, so I was being cheap. I'll drop the pH on them, but the damage is done, I'm gonna lose out on yield for sure at the very least, if not have to pull early if that's not it and I can't limp them through.
Hopefully I can blame it on myself, and it's not something truly wrong with the cut somehow. Oh well, it's all a learning experience, it's not like I wont have enough with the other plants in there lol.