I'm not sure if it's a real bug or if we are really unlucky but since new excas, the droprate of hidden abilities pokemons having a black ms has been really low ( around the usual 5% with no black ms).

Those 2 days I got 1 hidden ability out of 45-50 caught / roleplayed pokemons and one of my friend was testing it today and got 0 hidden ability out of 32 checks. Out of excavations my black ms worked perfectly fine.

Maybe it's just bad luck or maybe for some people / all people the black MS is disabled in excavations (like shinies are)

 

I read the patch notes and found nothing about it but maybe it's writen somewhere and I didn't see

 

Good evening ;)

Hey @Aventureur ,

 

This bug is already known.

 

We will fix this bug with the next server restart.

 

I hope you had a nice weekend!