Shadow does X-Ray ontop of slime blocks / other shadow problems

Whenever I saw the new snapshot that recently opened up, I decided to check for a few bugs. For example, whenever I was testing out the differences between the slime and honey blocks, I went into 3rd person and saw that my shadow made the slime block transparent. I decided to investigate with shadows further and saw that shadows are a little crazy on corners, whereas they cut off at the end, but they continue with the full shadow on the bottom block.