... after it's run out of fuel and so is no longer actually working. I only just noticed this in 12.10, after not having played all that much recently.
The red "out of fuel"-icon is flashing, the Drill is still making its usual noise, but its animation has stopped.
Burner Mining Drill keeps making noise
Re: Burner Mining Drill keeps making noise
Already fixed for next release:
https://forums.factorio.com/forum/vie ... 30&t=16754
https://forums.factorio.com/forum/vie ... 30&t=16754