When holding a burner mining drill it only announces how much ore is on the tile your cursor is over, instead of telling you how much ore would be under the burner mining drill in total

[MyNameIsTrez]

This is most likely also an issue with the electric mining drill.

[LevFendi]

Update: This issue still exists when placing the drill because it only reads the ore content on the tile you are looking at. Meanwhile, looking at a placed down burner or electric drill correctly reports the expected resources.