Tomatillos small, yellow and falling off - Help?

I have searched and searched and not found a single article that addresses this, I can't be the only person in the world with this problem, can I?

I have 3 big, healthy tomatillo plants in a large raised bed together, growing like crazy, covered with flowers and multiple types of bees pollinating them. It has tons of fruit, but all the fruits are small, yellow, and not healthy looking, and many are just dropping to the ground. I've tried calcium thinking it might be the equivalent of blossom end rot, I've tried a small amount of bio-live fertilizer. I don't water them much. Anyone have any idea what's making my tomatillos so unhappy? I thought these things were supposed to be easy like weeds?

in my experience tomatillos are pretty much easy sailing and the bugs that harrass all the other plants leave them alone.
What sounds odd is that usually the fruit are green, not yellow (not the kind I grow, anyway). Very odd.