Probably bug: drop rate scrolls like eg. J scroll didn't work after OTP and Old Moon Treaty Token (5% drop rate buff) activate.
As always if I have drop rate scrolls I go and drop crystals for manos. Typical is 8-10 sometimes even 14 crystals per hour with J scroll. But not today. Today in 2 hours with J scroll I dropped only 4 crystals (2 per hour). It's huge abnormal quantity.
Yes you can say: its rng, but still only 2 crystals with 100% drop rate? 1 - 2 crystals per hour it's typical drop without drop rate scrolls.
So I turn off OTP (5% buff) and used last J scroll and dropped ... 5 crystals. Not very good but sometimes that's all you get. But 5 not just 2 per hour.

Why is this happening? Bad implementation in the game. Probably Old Moon Treaty Token is a buff and buffs don't stack. Old Moon Treaty Token should increase the drop ratio same as bonus from knowledge.