I would add that CKPool has been almost two months with an average of 19P more or less without hitting a block, could it be due to the increase of the difficulty in these last months?
I think that 19P is like 190 asics of 100Th/s and it scares me to believe that it takes so many machines to not hit a block in 2 months.
Nope, it's just because 19P is a piddly small amount of hashrate. The difficulty increases have only been modest recently.