Marijuana plants burn up where the colas are suppose to grow

A question from a fellow grower:

Hey guys um having an issue with my plants. The strain is bubble gum I
bought from you I’m using Humboldt nutrients exactly by their feeding
guide and this has happened to 3 plants now. When I put them into
flowering they burn up where the colas are suppose to grow. I’m using
led lights so temp shouldn’t be an issue. Maybe you can tell me what’s
happening. This is a first for me.

Nute burn/nutrient overdose maybe or pH. It is hard to say. I don’t know anything about humboldt nutes. EC/PPM and pH info is needed. In the nute mix, in the water and in the soil to be sure.