Today I performed the last thorough inspection before the upcoming harvest and found this:
They are storing pollen in the flow frames! And not just a little bit, no it’s quite a lot! Will that affect the harvest? Will it block the mechanism? And why do they do that? There’s enough space in the brood box, queen laying excellently, even some space to draw new comb. No plans for swarming as far as I can see. They are not honey-bound or running out of space.