The title speaks for itself :
At EntityChangeBlockEvent, in my case a falling block, I get 0.0 on the method Entity#getFallDistance instead of the real distance.
[01:26:45] [Server thread/INFO]: [RandomTweaks] Falling distance (Entity#getFallDistance): 0.0 [01:26:45] [Server thread/INFO]: [RandomTweaks] Falling distance (My trick): 14.0