cryptic note

It’s year 4 winter, I have all of the secret notes except #10, cryptic note. I completed the mission to make it to level 25 of the skull cavern over 2 in game years ago… why won’t it drop?? I’ve opened countless giant crops in this time, been to the mines… I don’t understand, has this happened...

I am playing on an iPad. I have the cryptic note quest. A while after receiving the quest, I made it to floor 100 of skull caverns. I was given the milk, drank it, got the health bonus. Used a farm totem to get back to my farm. Now it has been over a week and the cryptic note quest is still...