Significantly worse on 1.14.4 to the point of making slime block bounce mechanisms entirely unusable. Bounces almost never work on the first attempt now, and I've had periods of upwards of a minute of constant triggering where the block will never cause a bounce.
yes, with the same exception each time
Oh, and i probably should point out that i am using en_UK language en_US seems to work fine
The cause of the bug seems to be moving whilst the slime block moves. If I stand perfectly still the bounce will work almost every time, but walking or falling as it moves causes it to fail to have any effect.