Not sure if bug - but didn't find deposit??

Hey

I know theres 3 coal deposits up north - i have 2 so far but when my geologist finished looking he didn't find the third... but i found it last time i searched up there as i had 3 mines on the go.

Is this a bug or have they incorporated the occasional time the ores are not found deliberately? This game is slow enough as it is!

probably the deposit was found, but is not displayed; try refresh your browser.

i relogged in - not found it even did the "awww" sound effect and said the deposit was not found =/ its annoying cos it takes hours to find coal and it locks up my geologist for ages so i can't explorer other deposits >.>