Not a bug [Indev 0.53] Moon Stone does not Come Back

[Icyesker]

Describe the bug you experienced here.
I have been to Mt. Moon Square once , I have smashed the rock and get a moonstone last time.
I go to Mt. Moon Square this Monday , and smash the rock , however I can't find any moonstone this time.
What I expected to happen:
I hope I can get the second moonstone

What actually happened:
I find nothing in the square.

 

[Darkfire]

this is intended
The stone should only appear once