What happened with chance to encounter Amanamu enemies?

I ran almost 40 maps with 17-18 pits today. By ran I mean go in, see the kurgal or ulaman and go next. Out of 40 maps I've seen Amanamu exactly 4 times. And last time it was 1 or 2 rares with void out of 18 pits, who didnt drop anything useful. This isnt random anymore. It's clearly not 1:3 chance.

Was mechanic shadow nerfed? Printing div temples okay, but abysses are not anymore?