funny chest texture looking from very specific angle

first im sorry if this is a duplicate. i have a lot of trouble with the search feature.

chest texture is funny when looked at from a very specific angle. i just updated to 19w39a and saw this immediately.

couple of things to note:

• this is a skyblock world (Skyblock 4)
• i'm 1 bottom slab from the lower build limit

idk if any of that would effect this glitch.