As title - not sure if intentional or not. Playing Monifactory and it wasn't the case in earlier versions (but apparently not a change made by the pack devs). Mining while holding shift (1 block) uses 1 durability. Mining without holding shift (3x3x1) uses one more durability than the amount of blocks mined, regardless of that amount. 1 block: -2 durability. 9 blocks: -10 durability. Etc.
If it is intentional then please disregard 🙂
