Ok. Thanks for sharing an awesome Game and solid alpha so far.
Btw if you are still on it, I tried a third time to get this Keystone, only this time I made sure to not open the inventory until I was in another part of the map. That worked and caused no freeze. Oddly enough when I came back to the Dig Site some days later I could dig up that very same keystone again. So this Keystone now totally confuses me. But in a fun was, like an weird pet ... :)