Factorio Forums

Reproduction Steps:
Place an Electric mining drill and start mining resources such as copper ore.
Connect a belt conveyor to the output of the Electric mining drill.
Intentionally clog the belt conveyor to prevent resources from being transported out of the Electric mining drill (e.g., block the end of the belt conveyor, transport a large amount of slow-moving items).
Wait until the Electric mining drill is full of resources and holds resources internally.
Directly pick up the Electric mining drill by selecting it with the mouse cursor and moving it to the inventory.
Check your inventory and confirm that the picked-up Electric mining drill and the resources (such as copper) that were inside the Electric mining drill have moved to your inventory.
Return to the resource mining location and check the resource deposit.

Expected Behavior:
When an Electric mining drill is picked up, it is considered normal behavior that the resources held inside are also picked up along with the Electric mining drill. However, the expected behavior is that the resource deposit should also decrease accordingly, and a state where resources can be infinitely proliferated should not occur.

Actual Behavior:
When the above steps are performed, the Electric mining drill and the resources inside are collected into the inventory, but the resource deposit does not decrease. By repeating this operation, if a situation where the belt conveyor is clogged is created, it becomes possible to infinitely proliferate resources.

Can you please post a save file showing this?

Thank you for your reply.
Save data attached.
You will be able to reproduce the reported phenomenon by picking up the electric mining drill next to the character.

Thanks for the save file. You have mining productivity 110% researched which means the drill will produce an ore from productivity before actually mining any in-world ore, and then get stuck because it can't put it anywhere. Because you then manually remove it, and put it back, and there is no other drill touching the ore it's trying to mine, it never reduces the ore amount in-world.

Since the only way to exploit this is to manually mine the drill, and at best you get 1 ore per operation, I don't consider this worth trying to change. The reward for sitting there manually hand-cranking the drill is you get some extra ore. But in reality, just building another ore patch would get you infinitely more ore that's already free in the world to collect.

Thank you for your investigation.
I overlooked the mining bonus.
It seems I'm still not proficient enough with Factorio.
I'll play the game more to become more familiar with it.