Might want to cut back on the treats, later feed is meant to be sole ration.PVC pipe auto feeders in run always full with layer feed crumbles.
Treats in AM...handful of scratch or fruit & veggie scraps, scrambled eggs 1x a week. If it’s over 90 I’ll give them frozen watermelon in the PM. Sometimes a cabbage or veggie piñata
Here's how I beat the heat waves:
https://www.backyardchickens.com/articles/aarts-hot-weather-spiel.75893/
EE could be 'low bird'...hopefully once they are all laying, things will settle down.Hopefully that’s all it is. Even though she only pecks my EE they all seem pretty terrified of her before she finally goes in to lay her egg.