This mod marks drills that have no more resources to mine for deconstruction.
A chest is marked for deconstruct if any of x (2 in my case) miners is marked for deconstruction even though the other miner still has ore.
I wanted to write about it myself recently that if you put more than 1 drill in the storage, then when the ore is depleted under 1 drill, all the others will stop working, since the storage is marked as being deleted
I found the logic bug causing this and pushed the fix as part of my pull request in the github.
Thanks robot256, a release has been made