Slime Blocks render incorrectly in third person or in hand

When on top of slime blocks and in third person view, the inside of the blocks render kinda weird. When I jumped onto the slime block, I didn't expect to see the inside of the block. I actually expected the slime block to be bouncy and to launch me high...
Steps to Reproduce:

1. Toggle third person view
2. go on top of a slime block.

The parts of slime blocks also render out of order when in the player's hand.
Steps to Reproduce:

1. Apply a solid texture to the slime, or use the debug pack
2. Hold a slime block in your hand

This bug also affects other semi-transparent blocks.