Placing ore inside abyssalite makes the abyssalite unrechable

This was accomplished in survival. Reloading did not fix the issue.

By placing a heavy-watt joint plate directly onto abysallite, a supplying duplicant will place the required ore inside the abyssalite. Once the ore has been placed, the dig errand becomes unreachable. After removing the build schematic, the ore remains inside the abysallite, and that tile of abyassilite becomes permanently unreachable for the dig errand. Placing another schematic allows a supplying duplicant to continuously feed ore into the abysallite. Should one desire, all could be fed to the Abyssalite till even the dupes themselves fall into its stony embrace. They are its hunger and its children yearning to return home. Though it will never be sated, their heat will remain its morsel forevermore, and so too will their energies linger in its perfect womb.

Oh, wait. The only miner with level 2 digging was off-world. Nevermind.