What deficiency is this?

Blue Tara, humboldt nutrients. The problem started at the top. The main cola is starting to look fried on the leaves. A couple fans leaves are beginning to curl under. One pic is the main cola. The other pic is one of the two main branches that is showing the early signs of the problem. Idk what the problem is, it is only affecting the blue Tara, while the golden haze, Santa Maria, and fallen angel are all fine.

wow...major heat stress by the look of it, also could be locking out nutrients with ph being out. never seen anything quite like the 2nd pic

I got the pics backwards in my description I think. Anyways I am thinking lockout too, just not sure what. I doubt it is a heat issue cause I have plants taller than it, closer to the light.

manganese?

I foliage fed with micro and a pk nute. Cause I think it is either k lockout or a micro deficiency. I've been so busy the past few weeks I may have not fed micro to the plants since late November early December. I haven't been paying enough attention to them the past month. I want to figure this blue out cause it has potential to be a prolific budder. I have four clones I took off of it, so I have the means to nail it down. This plant was a dream to grow through veg and begin of flower, but I'm afraid I have done something to fuck it up.

Could be heat stress which could caused over fert by takin in to much nutes which led to lock out. Hate to say it but it's late in the game to come from that

Looks like my ph meter was roughly 1.0 too high and had to be recalibrated, so the problem is a ph induced lockout