RNG my friend, that is all. I've been on the exact opposite side, getting quite a few teals following a rather meagre harvest in the past few weeks. Not like it matters with 1.5 hitting tomorrow, of course.
I thought the same thing but then I finished the dailies and the boss run and switched to another alt. Halfway through that boss run I thought to myself " ah, so that's where they all went.....greedy *****".