I found if you try cancelling the pave stone action while still having stone in the inventory causes this bug. If there are no more stone in your inventory when you cancel the pave stone command this does not seem to happen.
A workaround for the time being would be to use keyboard shortcuts to get back to the pave stone command and pave away all the stone you still have in your inventory.
So just recently i have noticed after playing for just a little bit of time it wont allow me to click any of my inventory items or anything on the interface?? it just clicks and makes my guy walk in that direction... Anyone else having this problem?