The bug
When a player hits another player's shield with an axe, with no enchantments, instead of having a chance for them to disable the shield, it happens every time. This did not happen in previous versions.
Expected result
Axes have a 25% chance of disabling shields, increasing by 5% with each level of efficiency and increasing by 75% on a sprint hit, as they did on previous versions, such as 1.10.
Code analysis
Code analysis can be found in this comment.