The bug

Since the fix of MC-120664, all items added before 18w30b have 1 less usage than before it was fixed. In versions before 1.13.1, a wooden pickaxe would mine 60 blocks (the pickaxe broke at -1). In versions 18w30b and above, a wooden pickaxe would now mine 59 blocks (the pickaxe does not break at 0 because of MC-120664, but the durability is still 59 instead of 60 for 60 mining usage).

How to reproduce

1. Use the command in 1.13

   /give @p minecraft:wooden_pickaxe{Damage:58}
   

2. You can break any block 2 times before the pickaxe breaks
3. Use the same command in 18w30b or any version above
   → It breaks at 0 as expected, but you only had 59 usage instead of 60