Missing Stone

[iceras]

I have started to notice my Mined stone is disappearing and I have not been spending it. I have lost stone so far 3 days in a row. I'm not sure how much stone I have lost but I know some is missing. I Had 0 stone when I logged in today I have mined 120 so far. I know I mined around 200 yesterday I have mine Depth 9, can you look into this as I'm a bit annoyed that the last 3 days I log in and have 0 stone, but still have my gems I mined.

Name: Iceras
Platform: Facebook
Level: 119