1. It's supposed to be impossible to use the teleport stone. No idea why that seems to work for (some?) people. But I made a fix for it, that the ship will reset when you enter the map of the area from the main camp.
2. Fixed it.
3. How exactly is it possible to trap yourself? Are you aware that you can reset the stones by entering the cave or leaving the area? And the yellow crystals can be removed with the grey stone on the right side in the same way as on the left side.