Big Dreapleaf doesn't make animation if placed next to a Skulk Sensor

If a Big Dripleaft is placed next to a sculksensor, when you are on it, it doesn't make the full falling animation, but only doing one frame of it, then reset its state.

Steps to Reproduce:

1. Place a Sculk Sensor
2. Place a Big Dripleaf on the block that is next to it
3. Walk on and wait for it to make you fall

Observed Results:

After a short delay (random ?), you will fall with only 1 frame of the animation, then the big dripleaf will reset its animation state (without any delay). 

Expected Results:

The dripleaf should do the normal falling animation, then reset its state after a little delay (~5 seconds).