Possible error in Sour Candy loot table - Pucker Charm not dropping

Platform: XBOX live 0.4.2.2

Items possibly affected: Sour candy

There is a pretty good chance that Pucker Charm is currently not dropping from harvesting Sour Candy.

From farming a few thousand Fresh Mint and Spicy candy I would estimate the drop rate at about one in 70 nodes for the other candy.
Let's say per full row of candy pieces collected in a box you will usually see one trinket (250 pieces = ~70 nodes) - this used to be my observed drop rate for Sour Candy as well although I might remember wrong here.

Currently I am trying to craft a second Wither Sting and have farmed about 850 Sour Candy so far and have yet to see a single Pucker Charm dropping.
I am fully aware that this is could be a matter of RNG, mathematically we are far outside of the estimated drop rate.
Normalized deviation for an estimated drop rate of 1/80 should be (at 850 attempts) bewteen ~7.3 and ~13.8.

Assuming my (partially gut felt) numbers are in a realistic ballpark please look into this. I need my sleek Wither Sting. =)