Rabbits get stuck in slabs

Rabbits appear to get stuck inside of slab blocks that are placed on the top of a block position. 

The rabbit attempted to run through the block then got stuck trying to exit. 

 

fun fact, this rabbit is still after nearly 10 minutes. 

The attached server screenshot is from a 1.15.1 paper server however in the second screenshot the same behavior was able to be replicated within a single player vanilla world.