Closed [Unstable][Archeology][Frustrating]

It's pretty self-explanatory. THIS happens practically with every fossil at some moment.

Sometimes it happens when I was almost done.
When the archeologic UI turns into a silent background, I can only close it with ESC button and mine the fossil for bones, because the mini-game never comes back no matter how I brush it.
Hope this won't go into stable version.
UPD : Just noted this happens both to me and my friend(!) when a horizontal hammer from advanced brush is used on a puzzle. "Moderate success to excavate a fossil", huh. Have to check the other brushes.

 

I am also experiencing this error.
This happens with the Advanced Brush's hammer tool (horizontal block of two squares). Whenever I have tried to use it, the game pauses for 5 - 10 seconds and then the same popup appears. Afterwards, the brush is lost, the fossil is still on the wall and no other brush is able to trigger the minigame.

The Master Brush doesn't have this bug and I have been able to excavate three fossils.
I have not tried the most basic brush.

 

I think the basic brush also works fine, I've only had problems with the advanced one.

 

So I tried the other brushes.
The basic brush really works fine, except for being basic.
The Master brush... Well, it has no horisontal hammer, so it doesn't have this bug. However, it has another issue. There is a possibility of immediate "excavation incomplete", that happened to a friend of mine with the first golden brush she used. I still couldn't get the same glitch, but sometimes the Master Brush is generating just enough(or 1-2 more than the amount of bones behind the stone) tools, that makes the excavation quite as hard as with the basic one.